MM-59934: Add Redis to CI and other improvements (#28164)

- Update library version.
- Added MaxFlush delay to help reduce CPU usage.
- Fall back to LRU cache for the caches which use SCAN.
- Added mattermost-redis and running for all api layer
tests in Postgres.

https://mattermost.atlassian.net/browse/MM-59934
```release-note
NONE
```

server/docker-compose.yaml

@@ -60,6 +60,13 @@ services:
     extends:
         file: build/docker-compose.common.yml
         service: opensearch
+  redis:
+    container_name: mattermost-redis
+    ports:
+      - "6379:6379"
+    extends:
+        file: build/docker-compose.common.yml
+        service: redis
   dejavu:
     container_name: mattermost-dejavu
     ports: