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/build/docker-compose-generator/main.go

@@ -32,6 +32,7 @@ func main() {
 		"openldap":           389,
 		"elasticsearch":      9200,
 		"opensearch":         9201,
+		"redis":              6379,
 		"dejavu":             1358,
 		"keycloak":           8080,
 		"prometheus":         9090,