Add tagger within tag view

What does this MR do?

The tagger was not visible within the tag views, this MR does show tagger info within the tag view, see #27729 (closed)

With the latest release of gitaly, the tagger info is provided by the backend as well, see gitaly#2120 (closed)

To be considered #19260 GPG signed commit and !17773 (merged)

🔧 with ❤ at Siemens

Screenshots

annotated tag from a user known by GitLab

annotated tag from a user unknown by GitLab

simple tag without any user information

signed tag

implementation is not part of that MR, will be a follow-up, but so we can do UX review once

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

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