CNF-13731: Add HTTP01ChallengeProxy types (PoC)

[sebrandon1]

Opening this PR a compliment to my enhancement PR here: openshift/enhancements#1773

This is just a proof of concept at the moment so I'll still be working on it.

[openshift-ci-robot]

@sebrandon1: This pull request references CNF-13731 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 epic to target the "4.20.0" version, but no target version was set.

In response to this:

Opening this PR a compliment to my enhancement PR here: openshift/enhancements#1773

This is just a proof of concept at the moment so I'll still be working on it.

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[openshift-ci]

Hello @sebrandon1! 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]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: sebrandon1
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[openshift-ci]

@sebrandon1: 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/verify	82240de	link	true	/test verify
ci/prow/lint	82240de	link	true	/test lint
ci/prow/verify-client-go	82240de	link	true	/test verify-client-go

Full PR test history. Your PR dashboard.

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