Resolve #3496452 "Use gitlab ci"

Closes #3496452

.gitlab-ci.yml

+include:
+  - project: $_GITLAB_TEMPLATES_REPO
+    ref: $_GITLAB_TEMPLATES_REF
+    file:
+        - "/includes/include.drupalci.main.yml"
+        - "/includes/include.drupalci.variables.yml"
+        - "/includes/include.drupalci.workflows.yml"
+
+variables:
+    SKIP_ESLINT: '1'
+    _CURL_TEMPLATES_REF: 'main'
+    OPT_IN_TEST_PREVIOUS_MINOR: '1'
+    OPT_IN_TEST_NEXT_MINOR: '1'
+    OPT_IN_TEST_MAX_PHP: '1'
+    OPT_IN_TEST_NEXT_MAJOR: '1'
+    RUN_JOB_UPGRADE_STATUS: '1'
+    OPT_IN_TEST_PREVIOUS_MAJOR: '1'
+    _LENIENT_ALLOW_LIST: 'moment,system_stream_wrapper'
+
+.composer-base:
+    before_script:
+      - composer config allow-plugins true
+
+phpunit:
+  variables:
+    SYMFONY_DEPRECATIONS_HELPER: "ignoreFile=$CI_PROJECT_DIR/$_WEB_ROOT/core/.deprecation-ignore.txt"
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