Resolve "Add tooltip to improve clarity of "detached" label/state in the merge request pipeline"

What does this MR do?

Updates the detached pipelines badge tooltip text to offer a better explanation. The new text is: The code of a detached pipeline is tested against the source branch instead of merged results.

This has been changed on:

• The pipelines page
• The pipelines details view
• The pipelines tab on the merge request page

Screenshots

Pipelines page:

Pipelines details page:

Pipelines tab on MR page:

Conformity

• Changelog entry for user-facing changes, or community contribution. Check the link for other scenarios.
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Performance 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

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

Closes #62137 (closed)