Fix bug: client side caching causes unexpected disconnections (async …

…version) (#3165)

* fix disconnects

* skip test in cluster

* add test

* save return value from handle_push_response (without it 'read_response' return the push message)

* insert return response from cache to the try block to prevent connection leak

* enable to get connection with data avaliable to read in csc mode and change can_read_destructive to not read data

* fix check if socket is empty (at_eof() can return False but this doesn't mean there's definitely more data to read)

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Co-authored-by: Chayim <[email protected]>

redis/_parsers/base.py

@@ -182,7 +182,7 @@ async def can_read_destructive(self) -> bool:
             return True
         try:
             async with async_timeout(0):
-                return await self._stream.read(1)
+                return self._stream.at_eof()
         except TimeoutError:
             return False