Add First Class OpenShift support

[ciarams87]

Proposed changes

Problem: As a cluster operator managing traffic for an OpenShift cluster
I want easily deploy NGF as my Gateway API implementation from the Operator Hub
So that it is easier for me to try out and use NGF for my OpenShift environment.

Solution: Add UBI based images and an Operator so we can begin the RedHat Operator Certification process and get NGF into the RedHat Certified OperatorHub

Epic: #3668

Testing:

• Ran the bundle on an OpenShift cluster, deployed the NGF control plane, and
  • deployed the Gateway using a LoadBalancer service and passed traffic from my local machine to the test backend
  • ran the conformance test suite (v1.2.1) and ensured everything passed (with some caveats)

DRAFT UNTIL #3989, #3980 and #4004 ARE MERGED

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

Added UBI based images and NGINX Gateway Fabric Operator.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.83%. Comparing base (6fc41cb) to head (0a0582f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4001   +/-   ##
=======================================
  Coverage   86.82%   86.83%           
=======================================
  Files         128      128           
  Lines       16607    16607           
  Branches       62       62           
=======================================
+ Hits        14419    14420    +1     
+ Misses       2006     2005    -1     
  Partials      182      182           

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[bjee19]

Is this just a merge of the feature branch or were there any other additional changes?

[ciarams87]

Is this just a merge of the feature branch or were there any other additional changes?

@bjee19 Just the merge of the feature branch!

[shaun-nx]

🚀

[salonichf5]

Is this just a merge of the feature branch or were there any other additional changes?

The commits reflect the PRs that were reviewed and merged, if that helps makes review simpler

[bjee19]

regarding the removing of GatewayStaticAddresses, do we have a system in place of running that test on main/edge when not trying to conform to 1.2.1 for openshift?

PR lgtm, as long as there is some plan moving forwards on that.