Export API keys for search service

[super-harsh]

What this PR does / why we need it:

Closes: #3053

Adding the support for exporting API keys for Azure Cognitive Search and reviving the authOptions property to enable users to select aadOrApiKey auth mode.

Special notes for your reviewer:

Also had to add the custom key matcher logic to replace/hide the base64 keys without '=' padding for the returned API keys

If applicable:

• this PR contains tests

[theunrepentantgeek]

Changes look good for exposing the keys, but how are you addressing the ARM API shape required for apiKeyOnly access?

The required ARM payload is this:

"authOptions": {
    "apiKeyOnly": {}
}

I don't see any changes to the ARM types or the CRD shape in this PR to address this.

[codecov-commenter]

Codecov Report

Merging #3065 (0f8a8aa) into main (eb24f83) will increase coverage by 0.00%.
The diff coverage is 60.00%.

@@           Coverage Diff            @@
##             main    #3065    +/-   ##
========================================
  Coverage   54.26%   54.26%            
========================================
  Files        1399     1400     +1     
  Lines      599240   599548   +308     
========================================
+ Hits       325179   325372   +193     
- Misses     220735   220815    +80     
- Partials    53326    53361    +35     

Impacted Files	Coverage Δ
...v1api20220901/search_service_spec_arm_types_gen.go	25.00% <ø> (ø)
...h/v1api20220901storage/search_service_types_gen.go	55.17% <ø> (ø)
v2/internal/testcommon/test_context.go	62.68% <40.00%> (-0.58%)	⬇️
...i/search/v1api20220901/search_service_types_gen.go	58.66% <57.56%> (+1.13%)	⬆️
.../search/customizations/search_service_extension.go	70.14% <70.14%> (ø)

... and 33 files with indirect coverage changes

[theunrepentantgeek]

Looks good.

[matthchr]

minor: should have a newline at the end here