Integrate poetry into devcontainers

[bearrito]

Following discussions here - #430
As well as looking at recent changes. It seems as though the devcontainer workflow is broken.

This PR will get you a working(?) install.

From within the container

vscode ➜ /workspaces/testcontainers-python (feature/poetry-devcontainers) $ poetry shell
Spawning shell within /home/vscode/.cache/pypoetry/virtualenvs/testcontainers-_53phrdA-py3.11                                                                          

Core tests passed.

(testcontainers-py3.11) vscode ➜ /workspaces/testcontainers-python (feature/poetry-devcontainers) $ make tests
poetry run pytest -v --cov=testcontainers.core core/tests
===================================================================================== test session starts =====================================================================================
platform linux -- Python 3.11.8, pytest-7.4.3, pluggy-1.4.0 -- /home/vscode/.cache/pypoetry/virtualenvs/testcontainers-_53phrdA-py3.11/bin/python
cachedir: .pytest_cache
rootdir: /workspaces/testcontainers-python
configfile: pyproject.toml
plugins: cov-4.1.0
collected 9 items                                                                                                                                                                             

core/tests/test_core.py::test_timeout_is_raised_when_waiting_for_logs 
---------------------------------------------------------------------------------------- live log call ----------------------------------------------------------------------------------------
INFO     testcontainers.core.container:container.py:63 Pulling image alpine
INFO     testcontainers.core.container:container.py:75 Container started: 9a5d98226c4d
PASSED                                                                                                                                                                                  [ 11%]
core/tests/test_core.py::test_garbage_collection_is_defensive 
---------------------------------------------------------------------------------------- live log call ----------------------------------------------------------------------------------------
INFO     testcontainers.core.container:container.py:63 Pulling image postgres:latest
INFO     testcontainers.core.container:container.py:75 Container started: d458d5998619
PASSED                                                                                                                                                                                  [ 22%]
core/tests/test_core.py::test_wait_for_hello 
---------------------------------------------------------------------------------------- live log call ----------------------------------------------------------------------------------------
INFO     testcontainers.core.container:container.py:63 Pulling image hello-world
INFO     testcontainers.core.container:container.py:75 Container started: 20e6376407b7
PASSED                                                                                                                                                                                  [ 33%]
core/tests/test_core.py::test_can_get_logs 
---------------------------------------------------------------------------------------- live log call ----------------------------------------------------------------------------------------
INFO     testcontainers.core.container:container.py:63 Pulling image hello-world
INFO     testcontainers.core.container:container.py:75 Container started: 5c7199f19cfd
PASSED                                                                                                                                                                                  [ 44%]
core/tests/test_docker_client.py::test_docker_client_from_env PASSED                                                                                                                    [ 55%]
core/tests/test_docker_client.py::test_container_docker_client_kw PASSED                                                                                                                [ 66%]
core/tests/test_docker_in_docker.py::test_wait_for_logs_docker_in_docker 
---------------------------------------------------------------------------------------- live log call ----------------------------------------------------------------------------------------
INFO     testcontainers.core.container:container.py:63 Pulling image hello-world
INFO     testcontainers.core.container:container.py:75 Container started: dbe61a3b6bc9
XFAIL (https://github.com/docker/docker-py/issues/2717)                                                                                                                                 [ 77%]
core/tests/test_new_docker_api.py::test_docker_custom_image 
---------------------------------------------------------------------------------------- live log call ----------------------------------------------------------------------------------------
INFO     testcontainers.core.container:container.py:63 Pulling image mysql:5.7.17
INFO     testcontainers.core.container:container.py:75 Container started: 38d5486270ce
INFO     testcontainers.core.waiting_utils:waiting_utils.py:52 Waiting for container <Container: 38d5486270ce> with image mysql:5.7.17 to be ready ...
PASSED                                                                                                                                                                                  [ 88%]
core/tests/test_new_docker_api.py::test_docker_kwargs 
---------------------------------------------------------------------------------------- live log call ----------------------------------------------------------------------------------------
INFO     testcontainers.core.container:container.py:63 Pulling image nginx:latest
INFO     testcontainers.core.container:container.py:75 Container started: 300b3af04ef1
INFO     testcontainers.core.container:container.py:63 Pulling image nginx:latest
INFO     testcontainers.core.container:container.py:75 Container started: dc1f9626454b
PASSED                                                                                                                                                                                  [100%]

---------- coverage: platform linux, python 3.11.8-final-0 -----------
Name                                        Stmts   Miss Branch BrPart  Cover
-----------------------------------------------------------------------------
core/testcontainers/core/__init__.py            0      0      0      0   100%
core/testcontainers/core/config.py              4      0      0      0   100%
core/testcontainers/core/container.py          97     15     26      8    80%
core/testcontainers/core/docker_client.py      56     17     16      5    64%
core/testcontainers/core/exceptions.py          2      0      0      0   100%
core/testcontainers/core/generic.py            23     23      2      0     0%
core/testcontainers/core/utils.py              46     22     10      0    43%
core/testcontainers/core/waiting_utils.py      45      8     16      4    80%
-----------------------------------------------------------------------------
TOTAL                                         273     85     70     17    65%
Coverage HTML written to dir htmlcov

However, some module based tests seemed to fail. Seems like this a known issue though - #428

---------- coverage: platform linux, python 3.11.8-final-0 -----------

=================================================================================== short test summary info ===================================================================================
FAILED modules/clickhouse/tests/test_clickhouse.py::test_docker_run_clickhouse - TimeoutError: Wait time (120s) exceeded for _connect(args: (), kwargs: {}). Exception: Code: 81.
================================================================================ 1 failed in 156.76s (0:02:36) ================================================================================
make: *** [Makefile:28: modules/clickhouse/tests] Error 1

Their is small downside to this. Poetry is installed as part of the post-create-command, which means everytime the container is spawned poetry has to be installed. This takes about 30 seconds. It is feasible to build another image inside devcontainers. However, that differs from current workflow. Let me know.

[alexanderankin]

since were not shipping this code to users and the old code is truly non-functional (after #408), im going to just merge