Filter pipelines by branch name

What does this MR do?

This MR introduces the ability to filter pipelines by branch name as well as trigger author which was introduced here. This MR also enables filter_pipelines_search by default.

Related issue: #215367 (closed)

Some takeaways

The public Api returns the first 20 authors and branches. So on each search input we also make an api call to fetch an author or branch based on that search term. These api calls are delayed for performance reasons.

Short demo

filter-demo

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