test: Test both mysql 5.7 and 8 in one workflow.

Now that we're using standard service containers, we can use a matrix to
test both the current supported versions in one job.  This should also
make it easier to test with future versions as we get ready to upgrade.

.github/workflows/migrations-check-mysql8.yml

@@ -1,76 +0,0 @@
-name: Migrations check on MySql 8.0
-
-on:
-  workflow_dispatch:
-  pull_request:
-  push:
-    branches:
-      - master
-
-jobs:
-  check_migrations:
-    name: check migrations mysql8
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ ubuntu-20.04 ]
-        python-version: [ 3.8 ]
-
-    steps:
-    - name: Checkout repo
-      uses: actions/checkout@v2
-
-    - name: Setup Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
-      with:
-        python-version: ${{ matrix.python-version }}
-
-    - name: Install system Packages
-      run: |
-        sudo apt-get update
-        sudo apt-get install -y libxmlsec1-dev
-
-    - name: Get pip cache dir
-      id: pip-cache-dir
-      run: |
-        echo "::set-output name=dir::$(pip cache dir)"
-
-    - name: Cache pip dependencies
-      id: cache-dependencies
-      uses: actions/cache@v3
-      with:
-        path: ${{ steps.pip-cache-dir.outputs.dir }}
-        key: ${{ runner.os }}-pip-${{ hashFiles('requirements/edx/development.txt') }}
-        restore-keys: ${{ runner.os }}-pip-
-
-    - name: Ubuntu and sql Versions
-      run: |
-        lsb_release -a
-        mysql -V
-
-    - name: Install Python dependencies
-      run: |
-        make dev-requirements
-
-    - name: Initiate Services
-      run: |
-        sudo systemctl start mongod
-        sudo /etc/init.d/mysql start
-
-    - name: Reset mysql password
-      run: |
-        cat <<EOF | mysql -h 127.0.0.1 -u root --password=root
-          UPDATE mysql.user SET authentication_string = null WHERE user = 'root';
-          FLUSH PRIVILEGES;
-        EOF
-
-    - name: Run Tests
-      env:
-        LMS_CFG: lms/envs/bok_choy.yml
-      run: |
-        echo "CREATE DATABASE IF NOT EXISTS edxtest;" | mysql -u root
-        echo "CREATE DATABASE IF NOT EXISTS student_module_history_test;" | mysql -u root
-        echo "Running the LMS migrations."
-        ./manage.py lms --settings bok_choy migrate
-        echo "Running the CMS migrations."
-        ./manage.py cms --settings bok_choy migrate

.github/workflows/migrations-check.yml

@@ -16,7 +16,7 @@ jobs:
         os: [ ubuntu-20.04 ]
         python-version: [ 3.8 ]
         mongo-version: ["4"]
-        mysql-version: ["5.7"]
+        mysql-version: ["5.7", "8"]
     services:
       mongo:
         image: mongo:${{ matrix.mongo-version }}