OCPCLOUD-3214: Add ClusterAPI config

[mdbooth]

[openshift-ci-robot]

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[openshift-ci-robot]

@mdbooth: This pull request references OCPCLOUD-3214 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.21.0" version, but no target version was set.

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[openshift-ci[bot]]

Hello @mdbooth! Some important instructions when contributing to openshift/api: API design plays an important part in the user experience of OpenShift and as such API PRs are subject to a high level of scrutiny to ensure they follow our best practices. If you haven't already done so, please review the OpenShift API Conventions and ensure that your proposed changes are compliant. Following these conventions will help expedite the api review process for your PR.

[openshift-ci[bot]]

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[coderabbitai[bot]]

📝 Walkthrough

Walkthrough

Adds a new ClusterAPI v1alpha1 API and related types (ClusterAPI, ClusterAPISpec, ClusterAPIStatus, ClusterAPIInstallerRevision/Component/Image, ClusterAPIList, RevisionName) to operator/v1alpha1. Registers the types in the scheme, generates OpenAPI and Swagger definitions, adds deepcopy implementations, provides a feature-gated CRD manifest, includes comprehensive YAML tests for ClusterAPI behavior, and adds a golangci-lint exclusion for the new types file.

🚥 Pre-merge checks | ✅ 1 | ❌ 2

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Description check	❓ Inconclusive	No description was provided by the author, making it impossible to assess whether it relates to the changeset.	Add a pull request description explaining the purpose, scope, and key changes related to the ClusterAPI configuration additions.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding ClusterAPI configuration, which aligns with the extensive additions of ClusterAPI types and related schema definitions across multiple files.

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✨ Finishing touches

• [ ] 📝 Generate docstrings

[!WARNING] There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 golangci-lint (2.5.0)

Error: build linters: unable to load custom analyzer "kubeapilinter": tools/_output/bin/kube-api-linter.so, plugin: not implemented The command is terminated due to an error: build linters: unable to load custom analyzer "kubeapilinter": tools/_output/bin/kube-api-linter.so, plugin: not implemented

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[openshift-ci[bot]]

@mdbooth: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/verify	e01cd64663784c8e494676a2a67418c1abddc684	link	true	/test verify

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