Add liveness and readiness probes to registry viewer container in the registry operator

[michael-valdron]

Please specify the area for this PR

What does does this PR do / why we need it:

Adds missing required probes removed in devfile/api#1019.

Other fixes:

• Configmap mount to registry viewer envfile set to read only
• URI Scheme for probes set to HTTP
• Insecure edge termination policy is set to redirect

Which issue(s) this PR fixes:

Fixes #?

part of devfile/api#1040

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 updated with your changes?

How to test changes / Special notes to the reviewer:

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.60 ⚠️

Comparison is base (3665c9b) 21.69% compared to head (6d90889) 21.10%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
- Coverage   21.69%   21.10%   -0.60%     
==========================================
  Files          22       22              
  Lines        1180     1213      +33     
==========================================
  Hits          256      256              
- Misses        915      948      +33     
  Partials        9        9              

Impacted Files	Coverage Δ
pkg/registry/deployment.go	0.00% <0.00%> (ø)
pkg/registry/route.go	0.00% <0.00%> (ø)

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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