Add license headers to scripts and configs

[michael-valdron]

Please specify the area for this PR

registry operator

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

Adds missing license headers to scripts, dockerfiles, workflows, and config files.

Related to: devfile/api#1243

Which issue(s) this PR fixes:

Fixes #?

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:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3801183) 26.43% compared to head (4bb9900) 26.43%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #55   +/-   ##
=======================================
  Coverage   26.43%   26.43%           
=======================================
  Files          25       25           
  Lines        1415     1415           
=======================================
  Hits          374      374           
  Misses       1020     1020           
  Partials       21       21           

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[michael-valdron]

Documentation

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

N/A

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: michael-valdron, rm3l

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