Prevent editing closed health status

What does this MR do?

• Hides the edit button for health status on the sidebar when issue/epic is closed. (The requirement changed to 👇)
• Disables the Edit button for health status on the sidebar when issue/epic is closed and show an informative tooltip message.

This MR completes the second leg of the two frontend tasks for Issue #220867 (closed).

Technically,

• Uses gl-tooltip-directive over gl-tooltip for consistency and conciseness.
• Retires GlDeprecatedDropdown and its related subcomponents in favor of the new versions.
• Retires the bootstrap utility classes from status.vue
• Fixes an existing UX bug (noted 👇 in the comments)

Screenshots

Demo

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

Issue #220867 (closed)