Add CapacityQuota API

[norbertcyran]

What type of PR is this?

/kind feature

What this PR does / why we need it:

This PR adds an v1alpha1 CapacityQuota CRD proposed in #8702. The logic handling this CRD will be implemented in the next PR.

Side changes:

• updated controller-gen - you can notice that there are slight changes in the generated code and CRDs
• refactored automation stuff - moved CRD generation makefile commands and update-codegen script to apis module, as it wasn't working correctly in the main module

Which issue(s) this PR fixes:

Part of #8703

Special notes for your reviewer:

Most of the code is generated. The important bits are mostly in capacityquota_types.go. You can notice that this CRD looks slightly different than the others. That's because I used a newer kubebuilder scaffolding. You might also want to take a look at the changes in the update-codegen script and the Makefiles.

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[k8s-ci-robot]

Hi @norbertcyran. Thanks for your PR.

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[norbertcyran]

/assign ellistarn towca

[ellistarn]

optional, some of these are already defined upstream if you wanted to point to them.

[ellistarn]

Seems like a lot of unrelated changes. Consider separating them out.

[ellistarn]

Nice. Overall LGTM