CORS-4332: Add GCP to the allowed platforms for dual stack

[barbacbd]

Added GCP as a platform that supports DualStack on Day-0
Added GCP as a platform that does not support conversion to DualStack on Day-2
Added tests for GCP

** GCP is behind a featuregate. Ensure that these featuregates are enablede before dual stack support is extended to GCP.

[openshift-ci-robot]

@barbacbd: This pull request references CORS-4332 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 "4.22.0" version, but no target version was set.

Details

In response to this:

Added GCP as a platform that supports DualStack on Day-0
Added GCP as a platform that does not support conversion to DualStack on Day-2
Added tests for GCP

** GCP is behind a featuregate. Ensure that these featuregates are enablede before dual stack support is extended to GCP.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[barbacbd]

/hold

[coderabbitai]

Walkthrough

Adds GCP dual-stack gating and related test updates: render logic now recognizes GCP as a supported dual-stack platform when the GCP dual-stack feature gate is enabled; tests updated to drive dual-stack behavior via feature gates and adjusted platform setups/statuses.

Changes

Cohort / File(s)	Summary
Platform support logic pkg/network/render.go	Extend isSupportedDualStackPlatform to include configv1.GCPPlatformType gated by apifeatures.FeatureGateGCPDualStackInstall; update comment to mention GCP alongside AWS and Azure.
Cluster config tests pkg/network/cluster_config_test.go	Update tests to drive dual-stack allowance via feature gates: add FeatureGateGCPDualStackInstall to dual-stack feature sets; adjust platform-type setups and status initializations so dual-stack is allowed only when the feature gate is present and disallowed when missing.
Render tests pkg/network/render_test.go	Add FeatureGateGCPDualStackInstall to default dual-stack feature gates; set infra.PlatformType to GCPPlatformType in TestAllowMigrationOnlyForSupportedTypes to validate GCP path.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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: can't load config: unsupported version of the configuration: "" See https://golangci-lint.run/docs/product/migration-guide for migration instructions
The command is terminated due to an error: can't load config: unsupported version of the configuration: "" See https://golangci-lint.run/docs/product/migration-guide for migration instructions

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: barbacbd
Once this PR has been reviewed and has the lgtm label, please assign knobunc for approval. For more information see the Code Review Process.

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[openshift-ci]

@barbacbd: The following tests 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/4.22-upgrade-from-stable-4.21-e2e-azure-ovn-upgrade	e7e4777	link	false	/test 4.22-upgrade-from-stable-4.21-e2e-azure-ovn-upgrade
ci/prow/hypershift-e2e-aks	e7e4777	link	true	/test hypershift-e2e-aks
ci/prow/e2e-aws-ovn-upgrade	e7e4777	link	true	/test e2e-aws-ovn-upgrade
ci/prow/e2e-aws-ovn-upgrade-ipsec	e7e4777	link	true	/test e2e-aws-ovn-upgrade-ipsec
ci/prow/lint	e7e4777	link	true	/test lint
ci/prow/e2e-aws-ovn-serial-1of2	e7e4777	link	true	/test e2e-aws-ovn-serial-1of2
ci/prow/e2e-metal-ipi-ovn-ipv6-ipsec	e7e4777	link	true	/test e2e-metal-ipi-ovn-ipv6-ipsec
ci/prow/4.22-upgrade-from-stable-4.21-e2e-aws-ovn-upgrade	e7e4777	link	false	/test 4.22-upgrade-from-stable-4.21-e2e-aws-ovn-upgrade
ci/prow/e2e-ovn-ipsec-step-registry	e7e4777	link	true	/test e2e-ovn-ipsec-step-registry
ci/prow/security	e7e4777	link	false	/test security
ci/prow/e2e-aws-ovn-hypershift-conformance	e7e4777	link	true	/test e2e-aws-ovn-hypershift-conformance

Full PR test history. Your PR dashboard.

Details

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