Display read-only targets in auto update modal

[spalmesano0]

Related issue: Resolves #45408

Checklist for submitter

• Changes file added for user-visible changes in changes/, orbit/changes/ or ee/fleetd-chrome/changes.

Testing

• Added/updated automated tests
• QA'd all new/changed functionality manually

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.19%. Comparing base (d8c2d6c) to head (bb40589).
⚠️ Report is 39 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #47527      +/-   ##
==========================================
- Coverage   67.20%   67.19%   -0.02%     
==========================================
  Files        3350     3521     +171     
  Lines      228159   228533     +374     
  Branches    11751    11910     +159     
==========================================
+ Hits       153342   153560     +218     
- Misses      60992    61147     +155     
- Partials    13825    13826       +1     

Flag	Coverage Δ
frontend	57.97% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.