Rename Apple Business Manager in UI and docs

[melpike]

Related issue: Resolves #42512

[codecov]

Codecov Report

❌ Patch coverage is 68.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.65%. Comparing base (f7f5664) to head (a10b71b).
⚠️ Report is 36 commits behind head on main.

Files with missing lines	Patch %	Lines
ee/server/service/vpp.go	66.66%	2 Missing ⚠️
server/fleet/utils.go	0.00%	2 Missing ⚠️
cmd/fleet/serve.go	0.00%	1 Missing ⚠️
cmd/fleetctl/fleetctl/get.go	80.00%	1 Missing ⚠️
frontend/pages/hosts/helpers.ts	0.00%	1 Missing ⚠️
server/mdm/apple/apple_bm.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #42584      +/-   ##
==========================================
+ Coverage   66.63%   66.65%   +0.02%     
==========================================
  Files        2532     2533       +1     
  Lines      202555   203043     +488     
  Branches     9180     9115      -65     
==========================================
+ Hits       134968   135336     +368     
- Misses      55384    55457      +73     
- Partials    12203    12250      +47     

Flag	Coverage Δ
backend	68.48% <70.83%> (+0.01%)	⬆️
frontend	54.43% <0.00%> (+0.11%)	⬆️

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