Improve stream robustness by always retrying worker (#66417)

Improve stream robustness by always retrying in the worker on failure, rather than only when
keepalive is enabled.

This will make cloud cameras like nest more robust, since they have a tendency to be flaky. This
is also needed to improve client side retry behavior because when the client attempts to retry,
the stream token is already revoked because the worker stopped.

The worker will still idle timeout if no streams are present, so it won't go on forever if no
frontend is viewing the stream.

tests/components/stream/conftest.py

@@ -16,7 +16,8 @@ from collections import deque
 from http import HTTPStatus
 import logging
 import threading
-from unittest.mock import patch
+from typing import Generator
+from unittest.mock import Mock, patch
 
 from aiohttp import web
 import async_timeout
@@ -219,6 +220,15 @@ def hls_sync():
         yield sync
 
 
+@pytest.fixture(autouse=True)
+def should_retry() -> Generator[Mock, None, None]:
+    """Fixture to disable stream worker retries in tests by default."""
+    with patch(
+        "homeassistant.components.stream._should_retry", return_value=False
+    ) as mock_should_retry:
+        yield mock_should_retry
+
+
 @pytest.fixture(scope="package")
 def h264_video():
     """Generate a video, shared across tests."""