add docker-compose for ci (#11795)

* add docker-compose for ci

* docker-compose logs does not have the option to set the dc file

* leverage docker-compose extends

This moves the developer `docker-compose.yml` to the root, extending the `build/docker-compose.yml` and overriding the `container_name` to preserve compatibility with the older, non-docker-compose setup.

Note that this required downgrading to docker-compose 2.4's file format (still supported by the newer tooling) due to the long and frustrating converstaion at https://github.com/moby/moby/issues/31101.

* remove -f docker-compose-ci.yml references

build/Jenkinsfile.pr

@@ -131,12 +131,12 @@ pipeline {
             }
 
             steps {
-                dir('src/github.com/mattermost/mattermost-server') {
+                dir('src/github.com/mattermost/mattermost-server/build') {
                     ansiColor('xterm') {
                         sh """
-                        /usr/local/bin/docker-compose --no-ansi -f ./build/docker-compose.yml run --rm start_dependencies
-                        /usr/local/bin/docker-compose --no-ansi -f ./build/docker-compose.yml ps
-                        cat tests/${LDAP_DATA}-data.ldif | /usr/local/bin/docker-compose --no-ansi -f ./build/docker-compose.yml exec -T openldap bash -c 'ldapadd -x -D "cn=admin,dc=mm,dc=test,dc=com" -w mostest';
+                        /usr/local/bin/docker-compose --no-ansi run --rm start_dependencies
+                        /usr/local/bin/docker-compose --no-ansi ps
+                        cat ../tests/${LDAP_DATA}-data.ldif | /usr/local/bin/docker-compose --no-ansi exec -T openldap bash -c 'ldapadd -x -D "cn=admin,dc=mm,dc=test,dc=com" -w mostest';
                         """
                     }
                 }

build/docker-compose.yml

@@ -1,4 +1,4 @@
-version: '3.4'
+version: '2.4'
 services:
   mysql:
     image: "mysql:5.7"