Python: [BREAKING]: removed display_name, renamed context_providers, middleware and AggregateContextProvider (#3139)

* removed display_name, renamed context_providers, middleware and AggregateContextProvider

* fixes

* fixed test

* testfix

* removed mistakenly put back test

* updated new test

* rename middlewares to middleware

* middleware fixes

python/packages/azurefunctions/tests/integration_tests/conftest.py

@@ -6,13 +6,18 @@ This module provides fixtures and configuration for pytest.
 """
 
 import subprocess
+import sys
 from collections.abc import Iterator, Mapping
+from pathlib import Path
 from typing import Any
 
 import pytest
 import requests
 
-from .testutils import (
+# Add the integration_tests directory to the path so testutils can be imported
+sys.path.insert(0, str(Path(__file__).parent))
+
+from testutils import (
     FunctionAppStartupError,
     build_base_url,
     cleanup_function_app,