Add container spec with image tag and image pull policy fields

[michael-valdron]

Please specify the area for this PR

registry

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

Adds a new container spec which now defines the fields to setup the individual containers in the deployed pod. This new spec currently supports image and imagePullPolicy (requested in devfile/api#730) with the scalability to add new container fields in the near future (e.g. memoryLimit).

Which issue(s) this PR fixes:

Fixes #?

fixes devfile/api#730

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:

[github-advanced-security]

You have successfully added a new gosec configuration .github/workflows/ci.yaml:go. As part of the setup process, we have scanned this repository and found no existing alerts. In the future, you will see all code scanning alerts on the repository Security tab.

[kim-tsao]

We should also update the bundle manifest to make sure everything is in sync, otherwise everything else looks good

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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[openshift-ci]

New changes are detected. LGTM label has been removed.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -1.48 ⚠️

Comparison is base (4ba7375) 21.35% compared to head (9b37b4b) 19.87%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #38      +/-   ##
==========================================
- Coverage   21.35%   19.87%   -1.48%     
==========================================
  Files          22       22              
  Lines        1199     1248      +49     
==========================================
- Hits          256      248       -8     
- Misses        934      989      +55     
- Partials        9       11       +2     

Impacted Files	Coverage Δ
api/v1alpha1/devfileregistry_types.go	100.00% <ø> (ø)
api/v1alpha1/zz_generated.deepcopy.go	24.89% <0.00%> (-1.33%)	⬇️
controllers/update.go	0.00% <0.00%> (ø)
pkg/registry/defaults.go	41.42% <0.00%> (-17.76%)	⬇️
pkg/registry/deployment.go	0.00% <0.00%> (ø)

... and 2 files with indirect coverage changes

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[michael-valdron]

/retest