fix(ci): Add MySQL service container support to CI workflows

- Add needs_mysql to services check
- Add MySQL service container configuration
- Add MySQL environment variables for tests

Author: tonal

scripts/split_tox_gh_actions/templates/test_group.jinja

@@ -8,7 +8,7 @@
         python-version: [{{ py_versions|join(",") }}]
         os: [ubuntu-22.04]
 
-    {% if needs_docker or needs_postgres or needs_redis %}
+    {% if needs_docker or needs_postgres or needs_redis or needs_mysql %}
     services:
       {% if needs_docker %}
       docker:
@@ -41,6 +41,20 @@
         ports:
           - 6379:6379
       {% endif %}
+      {% if needs_mysql %}
+      mysql:
+        image: mysql
+        env:
+          MYSQL_ROOT_PASSWORD: sentry
+          MYSQL_DATABASE: test_db
+        options: >-
+          --health-cmd "mysqladmin ping -h localhost"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 3306:3306
+      {% endif %}
     {% endif %}
     env:
       # 3.6/3.7 run in the python:X.Y container; tell uv to use that system Python.
@@ -53,6 +67,12 @@
       {% if needs_redis %}
       SENTRY_PYTHON_TEST_REDIS_HOST: {% raw %}${{ (matrix.python-version == '3.6' || matrix.python-version == '3.7') && 'redis' || 'localhost' }}{% endraw %}
       {% endif %}
+      {% if needs_mysql %}
+      SENTRY_PYTHON_TEST_MYSQL_HOST: {% raw %}${{ (matrix.python-version == '3.6' || matrix.python-version == '3.7') && 'mysql' || 'localhost' }}{% endraw %}
+      SENTRY_PYTHON_TEST_MYSQL_USER: root
+      SENTRY_PYTHON_TEST_MYSQL_PASSWORD: sentry
+      SENTRY_PYTHON_TEST_MYSQL_DB: test_db
+      {% endif %}
     container: {% raw %}${{ (matrix.python-version == '3.6' || matrix.python-version == '3.7') && format('python:{0}', matrix.python-version) || null }}{% endraw %}
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2