Modify backend entrypoint to wait redis (inmem and ondisk) (#7479)

Currently CVAT is just waiting for the database to start the server
process and the worker processes, but if redis instances (for queue and
cache processing) are not running we will get a non-functional cvat.
This PR adds availability checking for redis_ondisk and redis_inmem

supervisord/server.conf

@@ -32,7 +32,11 @@ process_name=%(program_name)s-%(process_num)d
 
 [fcgi-program:uvicorn]
 socket=unix:///tmp/uvicorn.sock
-command=python3 -m uvicorn --fd 0 --forwarded-allow-ips='*' cvat.asgi:application
+command=%(ENV_HOME)s/wait_for_deps.sh
+    python3 -m uvicorn
+        --fd 0
+        --forwarded-allow-ips='*'
+        cvat.asgi:application
 autorestart=true
 environment=CVAT_EVENTS_LOCAL_DB_FILENAME="events_%(process_num)03d.db",CVAT_POSTGRES_APPLICATION_NAME="cvat:server"
 numprocs=%(ENV_NUMPROCS)s