Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
       - name: Run docker compose
         run: |
-          cd build
+          cd server/build
           docker-compose --no-ansi run --rm start_dependencies
           cat ../tests/test-data.ldif | docker-compose --no-ansi exec -T openldap bash -c 'ldapadd -x -D "cn=admin,dc=mm,dc=test,dc=com" -w mostest';
           docker-compose --no-ansi exec -T minio sh -c 'mkdir -p /data/mattermost-test';
@@ -32,17 +32,19 @@ jobs:
           docker run --net ghactions_mm-test appropriate/curl:latest sh -c "until curl --max-time 5 --output - http://elasticsearch:9200; do echo waiting for elasticsearch; sleep 5; done;"
       - name: Run Tests
         run: |
-          if [[ ${{ github.event_name }} == 'push' ]]; then
+          if [[ ${{ github.ref_name }} == 'master' ]]; then
             export RACE_MODE="-race"
           fi
           mkdir -p client/plugins
-          cd build
+          cd server/build
           docker run --net ghactions_mm-test \
             --ulimit nofile=8096:8096 \
             --env-file=dotenv/test.env \
             --env MM_SQLSETTINGS_DRIVERNAME="${{ inputs.drivername }}" \
             --env MM_SQLSETTINGS_DATASOURCE="${{ inputs.datasource }}" \
+            --env TEST_DATABASE_MYSQL_DSN="${{ inputs.datasource }}" \
+            --env TEST_DATABASE_POSTGRESQL_DSN="${{ inputs.datasource }}" \
             -v ~/work/mattermost-server:/mattermost-server \
-            -w /mattermost-server/mattermost-server \
+            -w /mattermost-server/mattermost-server/server \
             $BUILD_IMAGE \
             make test-server$RACE_MODE BUILD_NUMBER=$GITHUB_HEAD_REF-$GITHUB_RUN_ID TESTFLAGS= TESTFLAGSEE=