Fix #14919. Should throw exception when camera stream closed by frontend (#15028)

* Fix #14919. Should throw exception when camera stream closed by frontend

* Re-trigger CI

* pythonic re-raise

homeassistant/components/camera/__init__.py

@@ -322,6 +322,7 @@ class Camera(Entity):
         except asyncio.CancelledError:
             _LOGGER.debug("Stream closed by frontend.")
             response = None
+            raise
 
         finally:
             if response is not None:

homeassistant/components/camera/proxy.py

@@ -233,6 +233,7 @@ class ProxyCamera(Camera):
             _LOGGER.debug("Stream closed by frontend.")
             req.close()
             response = None
+            raise
 
         finally:
             if response is not None: