Fixes z-index and margins of archived alert

What does this MR do?

Fixes z-index and margins of archived alert in job page

archived with empty state	archived with trace	non-archived	with open dropdown

Instructions to test locally

In order to archive a job, open the rails console and use: Ci::Build.find(id).degenerate!

What are the relevant issue numbers?

Closes #56019 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• [-] Documentation created/updated
• [-] Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• [-] Conforms to the database guides
• [-] Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• [-] Security reports checked/validated by reviewer