Update pytest-asyncio to 1.0.0 (#145988)

* Update pytest-asyncio to 1.0.0

* Remove event_loop fixture uses

tests/conftest.py

@@ -330,18 +330,18 @@ def long_repr_strings() -> Generator[None]:
 
 
 @pytest.fixture(autouse=True)
-def enable_event_loop_debug(event_loop: asyncio.AbstractEventLoop) -> None:
+def enable_event_loop_debug() -> None:
     """Enable event loop debug mode."""
-    event_loop.set_debug(True)
+    asyncio.get_event_loop().set_debug(True)
 
 
 @pytest.fixture(autouse=True)
 def verify_cleanup(
-    event_loop: asyncio.AbstractEventLoop,
     expected_lingering_tasks: bool,
     expected_lingering_timers: bool,
 ) -> Generator[None]:
     """Verify that the test has cleaned up resources correctly."""
+    event_loop = asyncio.get_event_loop()
     threads_before = frozenset(threading.enumerate())
     tasks_before = asyncio.all_tasks(event_loop)
     yield
@@ -492,9 +492,7 @@ def aiohttp_client_cls() -> type[CoalescingClient]:
 
 
 @pytest.fixture
-def aiohttp_client(
-    event_loop: asyncio.AbstractEventLoop,
-) -> Generator[ClientSessionGenerator]:
+def aiohttp_client() -> Generator[ClientSessionGenerator]:
     """Override the default aiohttp_client since 3.x does not support aiohttp_client_cls.
 
     Remove this when upgrading to 4.x as aiohttp_client_cls
@@ -504,7 +502,7 @@ def aiohttp_client(
     aiohttp_client(server, **kwargs)
     aiohttp_client(raw_server, **kwargs)
     """
-    loop = event_loop
+    loop = asyncio.get_event_loop()
     clients = []
 
     async def go(