APIM Backend, NamedValue and Subscription

[ross-p-smith]

Relates to #2747 and builds on #3368

This is the 2nd APIM Pull Request that adds Backend / NamedValue and Subscription. These are simple types

If applicable:

• this PR contains documentation
• this PR contains tests

[codecov-commenter]

Codecov Report

Merging #3376 (ee44d66) into main (c267abd) will decrease coverage by 0.03%.
The diff coverage is 52.08%.

@@            Coverage Diff             @@
##             main    #3376      +/-   ##
==========================================
- Coverage   54.49%   54.46%   -0.03%     
==========================================
  Files        1515     1527      +12     
  Lines      636546   639467    +2921     
==========================================
+ Hits       346855   348264    +1409     
- Misses     233033   234363    +1330     
- Partials    56658    56840     +182     

Files	Coverage Δ
...ment/customizations/backend_extension_types_gen.go	100.00% <100.00%> (ø)
.../customizations/named_value_extension_types_gen.go	100.00% <100.00%> (ø)
...customizations/subscription_extension_types_gen.go	100.00% <100.00%> (ø)
...i/apimanagement/v1api20220801/backend_types_gen.go	41.88% <ø> (ø)
...i/apimanagement/v1api20220801/service_types_gen.go	50.71% <ø> (ø)
...nagement/v1api20220801storage/service_types_gen.go	52.72% <ø> (ø)
...1api20220801/service_backend_spec_arm_types_gen.go	33.33% <33.33%> (ø)
...20220801/service_named_value_spec_arm_types_gen.go	33.33% <33.33%> (ø)
...0220801/service_subscription_spec_arm_types_gen.go	33.33% <33.33%> (ø)
...2/internal/controllers/controller_resources_gen.go	84.02% <82.02%> (-0.10%)	⬇️
... and 5 more

... and 31 files with indirect coverage changes

[matthchr]

/ok-to-test sha=f547a5d

[super-harsh]

Thanks for the follow-up PR for adding additional APIM resources. I've left a few minor comments on marking properties secret or armReferences, the rest all looks pretty solid to me. :)

[theunrepentantgeek]

I've had a quick skim and agree with @super-harsh - this is looking very good. I'll give it a proper review early next week.

[matthchr]

/ok-to-test sha=ca3a423

[matthchr]

Please make sure to use CreateResourceAndWait and not the Untracked variants once your final PR is merged.

[matthchr]

/azp run

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