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

• [x] 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.
• [x] I've read the CONTRIBUTION guide
• [x] I have added unit and/or e2e tests to cover my changes.
• [x] All new and existing tests passed.