Add /enroll URL for macOS in Add hosts modal

[spalmesano0]

Related issue: Resolves #38874

Checklist for submitter

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

Testing

• QA'd all new/changed functionality manually

[codecov]

Codecov Report

❌ Patch coverage is 81.25000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 67.20%. Comparing base (6735479) to head (73b15b8).
⚠️ Report is 34 commits behind head on main.

Files with missing lines	Patch %	Lines
...stsModal/PlatformWrapper/MacosPanel/MacosPanel.tsx	80.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #47528      +/-   ##
==========================================
- Coverage   67.21%   67.20%   -0.02%     
==========================================
  Files        3393     3522     +129     
  Lines      228267   228581     +314     
  Branches    11902    11773     -129     
==========================================
+ Hits       153424   153611     +187     
- Misses      61022    61150     +128     
+ Partials    13821    13820       -1     

Flag	Coverage Δ
frontend	57.97% <81.25%> (+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.