Bump up the minimum required MySQL version (#25465)

MySQL 5.7 is at end of life.

https://mattermost.atlassian.net/browse/MM-55589

```release-note
We bump up minimum MySQL version to be 8.0.0
```


Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

.github/workflows/esrupgrade-common.yml

@@ -60,7 +60,7 @@ jobs:
             --ulimit nofile=8096:8096 \
             --env-file=dotenv/test.env \
             --env MM_SQLSETTINGS_DRIVERNAME="mysql" \
-            --env MM_SQLSETTINGS_DATASOURCE="mmuser:mostest@tcp(mysql:3306)/mattermost_test?charset=utf8mb4,utf8&multiStatements=true&maxAllowedPacket=4194304" \
+            --env MM_SQLSETTINGS_DATASOURCE="mmuser:mostest@tcp(mysql:3306)/mattermost_test?charset=utf8mb4&multiStatements=true&maxAllowedPacket=4194304" \
             -v ~/work/mattermost:/mm \
             -w /mm \
             $BUILD_IMAGE &

.github/workflows/migration.yml

@@ -8,6 +8,7 @@ jobs:
     env:
       COMPOSE_PROJECT_NAME: ghactions
       BUILD_IMAGE: mattermost/mattermost-build-server:20230904_golang-1.20.7
+      TEST_IMAGE: migration-test-image
     defaults:
       run:
         working-directory: server
@@ -20,6 +21,23 @@ jobs:
           docker compose --ansi never run --rm start_dependencies
           docker compose --ansi never exec -T minio sh -c 'mkdir -p /data/mattermost-test';
           docker compose --ansi never ps
+      - name: Fix MySQL user permissions
+        run: |
+          cd build
+          docker exec ${COMPOSE_PROJECT_NAME}-mysql-1 sh -c "sed -i '/# default-authentication-plugin/c\default-authentication-plugin=mysql_native_password' /etc/my.cnf"
+          docker exec ${COMPOSE_PROJECT_NAME}-mysql-1 sh -c "mysql -u root -pmostest -e \"ALTER USER 'mmuser'@'%' IDENTIFIED WITH mysql_native_password BY 'mostest';\""
+          docker exec ${COMPOSE_PROJECT_NAME}-mysql-1 sh -c "mysql -u root -pmostest -e \"ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'mostest';\""
+          docker restart ${COMPOSE_PROJECT_NAME}-mysql-1 && sleep 10
+      - name: Build test image
+        run: |
+          echo -e "FROM $BUILD_IMAGE\n\nRUN apt update && \
+            apt remove -y pgloader && \
+            apt install -y sbcl unzip libsqlite3-dev make curl gawk freetds-dev libzip-dev && \
+            git clone https://github.com/dimitri/pgloader.git && \
+            cd pgloader && \
+            make && \
+            mv build/bin/pgloader /bin" >> dockerfile_tmp
+          docker build -t $TEST_IMAGE - < dockerfile_tmp
       - name: Generate test-data
         run: |
           docker run --net ${COMPOSE_PROJECT_NAME}_mm-test \
@@ -29,7 +47,7 @@ jobs:
             -e GOCACHE=/go/cache \
             -v $PWD:/mattermost \
             -w /mattermost \
-            $BUILD_IMAGE \
+            $TEST_IMAGE \
             make test-data
       - name: Migrate the DB and compare
         run: |
@@ -40,7 +58,7 @@ jobs:
           -e GOCACHE=/go/cache \
           -v $PWD:/mattermost \
           -w /mattermost \
-          $BUILD_IMAGE \
+          $TEST_IMAGE \
           make test-migration
       - name: Upload artifacts
         uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce # v3.1.2

.github/workflows/server-ci-template.yml

@@ -285,7 +285,7 @@ jobs:
     uses: ./.github/workflows/server-test-template.yml
     with:
       name: MySQL
-      datasource: mmuser:mostest@tcp(mysql:3306)/mattermost_test?charset=utf8mb4,utf8&multiStatements=true&maxAllowedPacket=4194304
+      datasource: mmuser:mostest@tcp(mysql:3306)/mattermost_test?charset=utf8mb4&multiStatements=true&maxAllowedPacket=4194304
       drivername: mysql
       logsartifact: mysql-server-test-logs
     secrets: inherit