MM-52679: Bump up minimum postgres version to 11 (#23315)

https://mattermost.atlassian.net/browse/MM-52679
```release-note
NONE
```

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/build/docker-compose.common.yml

@@ -39,7 +39,7 @@ services:
     volumes:
       - ./docker/mysql.conf.d/replica.cnf:/etc/mysql/conf.d/mysql.cnf
   postgres:
-    image: "postgres:10"
+    image: "postgres:11"
     restart: always
     networks:
       - mm-test