Issue #3412630 by phenaproxima: Run all tests on GitLab CI, replacing Drupal CI

.gitlab-ci.yml

auto-update

...c_updates_extensions/tests/src/Build/ModuleUpdateTest.php

...xtensions/tests/src/Functional/UnsuccessfulUpdateTest.php

...dates_extensions/tests/src/Functional/UpdateErrorTest.php

...tic_updates_extensions/tests/src/Traits/FormTestTrait.php

dictionary.txt

drupalci.yml

gitlab-ci.core.yml

package_manager/tests/src/Build/PackageUpdateTest.php

package_manager/tests/src/Build/TemplateProjectTestBase.php

...age_manager/tests/src/Traits/AssertPreconditionsTrait.php

package_manager/tests/src/Traits/ComposerInstallersTrait.php

package_manager/tests/src/Traits/ComposerStagerTestTrait.php

package_manager/tests/src/Traits/FixtureManipulatorTrait.php

package_manager/tests/src/Traits/FixtureUtilityTrait.php

...e_manager/tests/src/Traits/InstalledPackagesListTrait.php

...anager/tests/src/Traits/PackageManagerBypassTestTrait.php

package_manager/tests/src/Traits/ValidationTestTrait.php

tests/src/Functional/HelpPageTest.php