Update Ingress and Hostname

[Jdubrick]

Please specify the area for this PR

What does does this PR do / why we need it:
This PR updates the operator hostname to be consistent in its definition between the Helm deployment and the openshift deployment. Prior to this change the Helm chart implemented the CR name coupled with the namespace to create the hostname whereas the openshift deployment only used the CR name and the ingress.

Additionally the readme was updated with a Known Issues section as during testing I was trying to run make test-integration on Minikube, however, it was timing out and I could not figure out why this was happening. There was an active issue that outlined this and it would be good for others to be aware of known issues such as this in the future.

Some unit tests were also added to verify that the functions used to generate the combination of the hostname/ingress/name are working as intended.

Which issue(s) this PR fixes:

fixes devfile/api#1431

PR acceptance criteria:

• Test Coverage
  • Are your changes sufficiently tested, and are any applicable test cases added or updated to cover your changes?
• Gosec scans
  • Fix all MEDIUM and higher findings and/or annotate a finding per gosec instructions: https://github.com/securego/gosec#annotating-code to address why a finding is not a security issue

Documentation

• Does the registry operator documentation need to be updated with your changes?

How to test changes / Special notes to the reviewer:

• make test passes
• make test-integration passes

[Jdubrick]

/test v4.12-registry-operator-integration-test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.34%. Comparing base (7c6b2a6) to head (4a75101).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #80      +/-   ##
==========================================
+ Coverage   26.43%   27.34%   +0.91%     
==========================================
  Files          25       25              
  Lines        1415     1430      +15     
==========================================
+ Hits          374      391      +17     
+ Misses       1020     1018       -2     
  Partials       21       21              

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[michael-valdron]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Jdubrick, michael-valdron

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