v1beta1 API for cosigned

[vaikas]

Summary

Add v1beta1 API for cosigned.

Ticket Link

Fixes #1835

-->
Fixes

Release Note

Add v1beta1 API for cosigned

[hectorj2f]

@vaikas It seems we are missing the new CRD version in config/300-clusterimagepolicy.yaml

[vaikas]

@hectorj2f yeah, I need to figure out how to do this safely with the codegen :)

[vaikas]

I'm looking at the test failures, but it seems to not be able to get the latest release tag for scaffolding:

++ curl -s -u username:*** https://api.github.com/repos/sigstore/scaffolding/releases/latest
+ tag=null
+ echo 'Installing kind and knative using release'
+ curl -Lo ./setup-kind.sh https://github.com/sigstore/scaffolding/releases/download/null/setup-kind.sh

Notice the tag is null

[codecov-commenter]

Codecov Report

Merging #1890 (6c6dee6) into main (5d87c9d) will increase coverage by 0.67%.
The diff coverage is 44.61%.

@@            Coverage Diff             @@
##             main    #1890      +/-   ##
==========================================
+ Coverage   33.35%   34.02%   +0.67%     
==========================================
  Files         146      153       +7     
  Lines        9370     9936     +566     
==========================================
+ Hits         3125     3381     +256     
- Misses       5874     6175     +301     
- Partials      371      380       +9     

Impacted Files	Coverage Δ
cmd/cosign/policy_webhook/main.go	0.00% <0.00%> (ø)
...apis/cosigned/v1alpha1/clusterimagepolicy_types.go	0.00% <ø> (ø)
.../apis/cosigned/v1beta1/clusterimagepolicy_types.go	0.00% <0.00%> (ø)
pkg/apis/cosigned/v1beta1/register.go	0.00% <0.00%> (ø)
pkg/apis/cosigned/v1beta1/zz_generated.deepcopy.go	0.00% <0.00%> (ø)
...cosigned/v1alpha1/clusterimagepolicy_conversion.go	79.41% <79.41%> (ø)
.../cosigned/v1beta1/clusterimagepolicy_validation.go	93.83% <93.83%> (ø)
...cosigned/v1alpha1/clusterimagepolicy_validation.go	93.75% <100.00%> (-0.09%)	⬇️
.../cosigned/v1beta1/clusterimagepolicy_conversion.go	100.00% <100.00%> (ø)
...is/cosigned/v1beta1/clusterimagepolicy_defaults.go	100.00% <100.00%> (ø)
... and 20 more

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[hectorj2f]

LGTM, it looks good to me. We can add the e2e tests in a different PR.

[hectorj2f]

thanks @dlorenc :)