Add message in CI linter that it was validated with includes

What does this MR do?

Add more information after linting to show users that their configuration has been linted with all the includes that are listed in the configuration. There is a feature flag ci_lint_vue that has a new vue section. Therefore to make this change, I updated it in both places and when we get rid of the flag, we'll simply remove the whole haml section.

Screenshots (strongly suggested)

Before

With ci_lint_vue feature flag turned off

With ci_lint_vue feature flag turned on

After

With ci_lint_vue feature flag turned off

With ci_lint_vue feature flag turned on

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Related to #273434 (closed)