36693 Do not send Automatic ENrollment Profile to Apple when it hasn't actually changed

[JordanMontgomery]

Related issue: Resolves #36693

If a prior automatic enrollment(setup assistant) profile exists, compares it to the one being sent in the request and only revalidates it with Apple when it changes

Checklist for submitter

If some of the following don't apply, delete the relevant line.

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

• Input data is properly validated, SELECT * is avoided, SQL injection is prevented (using placeholders for values in statements)

• If paths of existing endpoints are modified without backwards compatibility, checked the frontend/CLI for any necessary changes

Testing

• Added/updated automated tests

• Where appropriate, automated tests simulate multiple hosts and test for host isolation (updates to one hosts's records do not affect another)

• QA'd all new/changed functionality manually

[codecov]

Codecov Report

❌ Patch coverage is 81.81818% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.92%. Comparing base (0231c28) to head (9211415).
⚠️ Report is 129 commits behind head on main.

Files with missing lines	Patch %	Lines
ee/server/service/mdm.go	81.81%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #36893      +/-   ##
==========================================
+ Coverage   65.89%   65.92%   +0.03%     
==========================================
  Files        2250     2251       +1     
  Lines      183931   184311     +380     
  Branches     7610     7610              
==========================================
+ Hits       121195   121501     +306     
- Misses      51662    51705      +43     
- Partials    11074    11105      +31     

Flag	Coverage Δ
backend	67.71% <81.81%> (+0.03%)	⬆️

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[MagnusHJensen]

LGTM, skips if content is the same, but updates if it differs