Add asyncio detection based on get_running_loop

Author: tapetersen

sniffio/_impl.py

@@ -74,6 +74,12 @@ async def generic_sleep(seconds):
     # Need to sniff for asyncio
     if "asyncio" in sys.modules:
         import asyncio
+        try:
+            asyncio.get_running_loop()
+            return "asyncio"
+        except (AttributeError, RuntimeError):
+            pass
+
         try:
             current_task = asyncio.current_task  # type: ignore[attr-defined]
         except AttributeError: