Use PCRE on proxy redirect property

[leonardoramosantos]

NGINX accepts PCRE patterns on the proxy_redirect property.
This PR introduces URLWithNginxVariableRegex, a validation to make sure that both proxy-redirect-from and proxy-redirect-to annotations accept this pattern.
Added e2e tests to cover it.

What this PR does / why we need it:

This PR covers at least these two open issues:
12917
10698

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• CVE Report (Scanner found CVE and adding report)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

Fixes #12917
Fixes #10698

How Has This Been Tested?

Created e2e tests, after that: make kind-e2e-test.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added unit and/or e2e tests to cover my changes.
• All new and existing tests passed.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: leonardoramosantos / name: Leonardo Ramos dos Santos (b22ae63, c9ad46a, 7e4e360)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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[k8s-ci-robot]

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[k8s-ci-robot]

Hi @leonardoramosantos. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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✅ Deploy Preview for kubernetes-ingress-nginx canceled.

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✅ Deploy Preview for kubernetes-ingress-nginx canceled.

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[leonardoramosantos]

/retest

[k8s-ci-robot]

@leonardoramosantos: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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 kubernetes-sigs/prow repository.

[strongjz]

/ok-to-test
/priority backlog
/triage accepted
/kind bug

[strongjz]

@Gacko is it too late to get this into the latest patch release?

[Gacko]

Yes. Also because I haven't reviewed it nor think it's just a patch.

[Gacko]

/hold