Fixes #38827 - show hostgroup hierarchy in bulk change dropdown

[jeremylenz]

Summary

This PR fixes a UX regression in the bulk "Change Hostgroup" action on the All Hosts page. The old ERB implementation showed the nested hostgroup structure (e.g., "Parent/Child/Grandchild"), but the new React implementation only showed the final hostgroup name, making it difficult to distinguish between hostgroups with the same name but different parents.

Changes:

• Upgraded HostGroupSelect component from deprecated PatternFly v4 to PatternFly v5 API
• Added custom rendering to display hierarchical structure in dropdown options
• When closed: displays only the hostgroup name (clean display)
• When open: displays styled hierarchy with parent parts in gray and final part in bold (e.g., "Base > Production > WebServers")
• Enhanced typeahead filtering to search both name and full path

Test Plan

1. Navigate to All Hosts page
2. Select multiple hosts using checkboxes
3. Click "Select Action" > "Change Hostgroup"
4. Open the hostgroup dropdown
5. Verify that hostgroups with parent structure show the full hierarchy (e.g., "Parent > Child > Grandchild")
6. Verify that parent parts are displayed in gray text and the final part is bold
7. Test the typeahead search by typing part of a parent or child name
8. Verify that filtering works for both the hostgroup name and the full hierarchical path
9. Select a hostgroup and verify it displays only the name when the dropdown is closed

Generated with Claude Code

[nofaralfasi]

The code changes work as expected, but it looks like the failing tests are related to these updates.

[jeremylenz]

🍏