feat: enhance E2E testing setup and model reporting

- Added a new fixture to manage runtime report artifacts in a writable temp directory during E2E tests, addressing permission issues in local CI/dev environments.
- Updated `conftest.py` to include a requirements.txt file in the model packaging path for training activities.
- Refactored existing fixtures to use `pytest.fixture` instead of `pytest_asyncio.fixture` for better compatibility.
- Enhanced the `Reports` class to include a target alias for report metrics, ensuring compatibility with Evidently's reporting requirements.
- Introduced new test scenarios to validate the handling of missing and whitespace-only `date_column` inputs in the training workflow.

These changes improve the robustness of the E2E testing framework and enhance the clarity of model reporting metrics.

tests/activities/test_experiment_tracking.py

@@ -136,6 +136,11 @@ def test_experiment_tracking_del_with_engine_exception(
     et.engine = MagicMock()
 
     class MockSuperWithError:
+        _should_raise: bool
+
+        def __init__(self) -> None:
+            self._should_raise = False
+
         def __del__(self):
             # Only raise error if not being cleaned up by garbage collector
             # This prevents the PytestUnraisableExceptionWarning
@@ -215,7 +220,7 @@ def test_update_experiment_run_status_success(
         mock_execute(*args, **kwargs)
         return {'rowcount': 1}
 
-    et._execute_update = mock_execute_update
+    et._execute_update = mock_execute_update  # type: ignore[method-assign]
     et.info = MagicMock()
 
     input_data = {
@@ -293,7 +298,7 @@ def test_update_experiment_run_status_with_error_success(
         mock_execute(*args, **kwargs)
         return {'rowcount': 1}
 
-    et._execute_update = mock_execute_update
+    et._execute_update = mock_execute_update  # type: ignore[method-assign]
     et.info = MagicMock()
 
     input_data = {
@@ -339,7 +344,7 @@ def test_update_experiment_run_status_with_error_truncate_message(
         mock_execute(*args, **kwargs)
         return {'rowcount': 1}
 
-    et._execute_update = mock_execute_update
+    et._execute_update = mock_execute_update  # type: ignore[method-assign]
     et.info = MagicMock()
 
     long_error = 'x' * 2000
@@ -416,7 +421,7 @@ def test_update_experiment_run_model_saved_success(
         mock_execute(*args, **kwargs)
         return {'rowcount': 1}
 
-    et._execute_update = mock_execute_update
+    et._execute_update = mock_execute_update  # type: ignore[method-assign]
     et.info = MagicMock()
 
     input_data = {
@@ -526,7 +531,7 @@ def test_update_experiment_run_no_rows_updated(
     def mock_execute_update(*args, **kwargs):
         return {'rowcount': 0}
 
-    et._execute_update = mock_execute_update
+    et._execute_update = mock_execute_update  # type: ignore[method-assign]
     et.send_notification = MagicMock()
 
     input_data = {