fs: http: do not timeout on sock_read

We have been getting reports that the timeout on sock_read was raising
timeout error even for chunked uploads, and sometimes even uploading
zero-byte files.

See: https://github.com/iterative/dvc/issues/8065
and iterative/dvc#8100.

These kinds of logics don't belong here, and should be upstreamed (eg: RetryClient/ClientTimeout, etc).
We added timeout in iterative/dvc#7460 because of freezes in
iterative/dvc#7414.

I think we can rollback this for now given that there are lots of report of failures/issues with this line,
and if we get any new reports of hangs, we'll investigate it separately.

src/dvc_objects/fs/implementations/http.py

@@ -117,7 +117,7 @@ async def get_client(self, **kwargs):
             total=None,
             connect=self.REQUEST_TIMEOUT,
             sock_connect=self.REQUEST_TIMEOUT,
-            sock_read=self.REQUEST_TIMEOUT,
+            sock_read=None,
         )
 
         return RetryClient(**kwargs)