Remove "Details" from breadcrumb and JSON+JD on Group top page

What does this MR do?

Removes "Details" from breadcrumb and JSON+JD on Group (top-level and sub-) top page.

Relates to !47817 (merged) (for Project)

Screenshots (strongly suggested)

Before	After
TBD

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [n/a] Documentation (if required)
• Code review guidelines
• [n/a] Merge request performance guidelines
• Style guides
• Separation of EE specific content

Related to #284008 (closed)