Move pipeline lint warnings to Vue

What does this MR do?

This MR moves over the pipeline lint warnings to the Vue implementation of the Run pipeline view. During this move, I've also made the pipeline warnings now dismissible. As well as changed the pipelines controller JSON response to include the pipeline warnings.

Currently we don't have a smart way on the Vue side of things to parse markdown and find links, so since this is an MVC, the links are just plain text for now.

Screenshots

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