ci/lava: Create LogFollower and move logging methods

- Create LogFollower to capture LAVA log and process it adding some
- GitlabSection and color treatment to it
- Break logs further, make new gitlab sections between testcases
- Implement LogFollower as ContextManager to deal with incomplete LAVA
  jobs.
- Use template method to simplify gitlab log sections management
- Fix sections timestamps

Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16323>

.gitlab-ci/tests/conftest.py

@@ -0,0 +1,51 @@
+from unittest.mock import MagicMock, patch
+
+import pytest
+import yaml
+from freezegun import freeze_time
+
+from .lava.helpers import generate_testsuite_result, jobs_logs_response
+
+
+@pytest.fixture
+def mock_sleep():
+    """Mock time.sleep to make test faster"""
+    with patch("time.sleep", return_value=None):
+        yield
+
+
+@pytest.fixture
+def frozen_time(mock_sleep):
+    with freeze_time() as frozen_time:
+        yield frozen_time
+
+
+RESULT_GET_TESTJOB_RESULTS = [{"metadata": {"result": "test"}}]
+
+
+@pytest.fixture
+def mock_proxy():
+    def create_proxy_mock(
+        job_results=RESULT_GET_TESTJOB_RESULTS,
+        testsuite_results=[generate_testsuite_result()],
+        **kwargs
+    ):
+        proxy_mock = MagicMock()
+        proxy_submit_mock = proxy_mock.scheduler.jobs.submit
+        proxy_submit_mock.return_value = "1234"
+
+        proxy_results_mock = proxy_mock.results.get_testjob_results_yaml
+        proxy_results_mock.return_value = yaml.safe_dump(job_results)
+
+        proxy_test_suites_mock = proxy_mock.results.get_testsuite_results_yaml
+        proxy_test_suites_mock.return_value = yaml.safe_dump(testsuite_results)
+
+        proxy_logs_mock = proxy_mock.scheduler.jobs.logs
+        proxy_logs_mock.return_value = jobs_logs_response()
+
+        for key, value in kwargs.items():
+            setattr(proxy_logs_mock, key, value)
+
+        return proxy_mock
+
+    yield create_proxy_mock