Fix reliability tests regex statements

[RamosFe]

Description

Fix test_cluster_sync.py regex statements related to logs.

---

[GGP1]

This change looks good to me. However, there is one test (test_cluster_connection.py) that will fail sporadically if we don't change it.

I think we should use keep alive messages to validate the nodes connections instead of the first connection message, which can be trimmed from the logs if there are too many messages.

[RamosFe]

After implementing the changes suggested by @GGP1, the test passed without any errors:

python3 -m pytest ./test_cluster --artifacts_path /Users/framos/Downloads/artifacts --html=report.html
=========================================================================== test session starts ============================================================================
platform darwin -- Python 3.9.6, pytest-7.1.2, pluggy-0.13.1
rootdir: /Users/framos/Documents/Wazuh/Repositories/wazuh-qa/tests, configfile: pytest.ini
plugins: testinfra-5.0.0, html-3.1.1, metadata-2.0.4
collected 6 items                                                                                                                                                          

test_cluster/test_cluster_logs/test_cluster_connection/test_cluster_connection.py .                                                                                  [ 16%]
test_cluster/test_cluster_logs/test_cluster_error_logs/test_cluster_error_logs.py .                                                                                  [ 33%]
test_cluster/test_cluster_logs/test_cluster_master_logs_order/test_cluster_master_logs_order.py .                                                                    [ 50%]
test_cluster/test_cluster_logs/test_cluster_sync/test_cluster_sync.py .                                                                                              [ 66%]
test_cluster/test_cluster_logs/test_cluster_task_order/test_cluster_task_order.py .                                                                                  [ 83%]
test_cluster/test_cluster_logs/test_cluster_worker_logs_order/test_cluster_worker_logs_order.py .                                                                    [100%]

------------------------------ generated html file: file:///Users/framos/Documents/Wazuh/Repositories/wazuh-qa/tests/reliability/report.html -------------------------------
============================================================================ 6 passed in 28.85s ============================================================================

[GGP1]

The issue release is 4.10.1 but the PR points to master, the branch corresponding to the target release version does not exist yet (it does exist in wazuh/wazuh), so we should wait until it is created to proceed.

This is to avoid the scenario in which the branch is created before the PR is merged and the change is not applied.

[GGP1]

LGTM