[IO-1331][internal] Introduce E2E tests module

[owencjones]

Problem

No provision for E2E tests in darwin-py

Solution

Added configured pytest module.

Changelog

Added pytest module
Added pytest.ini fule
Added minor docs.

[linear]

IO-1331 Create E2E testing module in darwin-py

Create a simple, largely empty module, setup not to run when pytest is normally run, using pytest config. Include an example test which doesn't actually test anything (this can be used for checking it runs or not)

Acceptance criteria

• There is an E2E module in darwin-py
• It's a fully functioning pytest set
• It's not to run unless directed to separately (e.g. pytest command at command line doesn't run this direction, but something like pytest e2e does,

[Nathanjp91]

So the intention here is that it'll only be run via Github Actions (or if you want to manually test)?

[owencjones]

Exactly, yeah

[owencjones]

You can run pytest e2e_tests and it will run them, but still run pytest on your local machine