Add support for Fleet

[nibooy]

What this PR does / why we need it:
Add support for Fleet, FleetsMember, FleetsUpdateRun

Special notes for your reviewer:

How does this PR make you feel:

If applicable:

• this PR contains documentation
• this PR contains tests

[codecov-commenter]

Codecov Report

Merging #3336 (f693716) into main (40810e1) will decrease coverage by 0.02%.
The diff coverage is 58.45%.

@@            Coverage Diff             @@
##             main    #3336      +/-   ##
==========================================
- Coverage   54.51%   54.49%   -0.02%     
==========================================
  Files        1483     1495      +12     
  Lines      628101   630865    +2764     
==========================================
+ Hits       342408   343807    +1399     
- Misses     229568   230696    +1128     
- Partials    56125    56362     +237     

Files	Coverage Δ
...ervice/customizations/fleet_extension_types_gen.go	100.00% <100.00%> (ø)
...ustomizations/fleets_member_extension_types_gen.go	100.00% <100.00%> (ø)
...mizations/fleets_update_run_extension_types_gen.go	100.00% <100.00%> (ø)
...1api20230315preview/fleets_update_run_types_gen.go	52.78% <ø> (ø)
...2/internal/controllers/controller_resources_gen.go	85.97% <100.00%> (+0.12%)	⬆️
...e/v1api20230315preview/fleet_spec_arm_types_gen.go	33.33% <33.33%> (ø)
...0230315preview/fleets_member_spec_arm_types_gen.go	33.33% <33.33%> (ø)
...315preview/fleets_update_run_spec_arm_types_gen.go	33.33% <33.33%> (ø)
...i20230315previewstorage/fleets_member_types_gen.go	52.72% <52.72%> (ø)
...30315previewstorage/fleets_update_run_types_gen.go	52.72% <52.72%> (ø)
... and 3 more

... and 32 files with indirect coverage changes

[theunrepentantgeek]

This looks very good - I've found little to critique during my review. Fix up the $supportedFrom setting and a couple other minor things and we can merge this.

[matthchr]

LGTM except a few some minor nits.

[theunrepentantgeek]

/ok-to-test sha=f693716

[theunrepentantgeek]

/ok-to-test sha=f693716

[theunrepentantgeek]

/azp run

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