Warn ontime.sleep in event loop (#63766)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

homeassistant/block_async_io.py

@@ -1,14 +1,18 @@
-"""Block I/O being done in asyncio."""
+"""Block blocking calls being done in asyncio."""
 from http.client import HTTPConnection
+import time
 
 from .util.async_ import protect_loop
 
 
 def enable() -> None:
-    """Enable the detection of I/O in the event loop."""
+    """Enable the detection of blocking calls in the event loop."""
     # Prevent urllib3 and requests doing I/O in event loop
     HTTPConnection.putrequest = protect_loop(HTTPConnection.putrequest)  # type: ignore
 
+    # Prevent sleeping in event loop. Non-strict since 2022.02
+    time.sleep = protect_loop(time.sleep, strict=False)
+
     # Currently disabled. pytz doing I/O when getting timezone.
     # Prevent files being opened inside the event loop
     # builtins.open = protect_loop(builtins.open)