[Devtools week] Update license headers

[thepetk]

Please specify the area for this PR
license headers update

What does does this PR do / why we need it:
Updates the license header copyright section to Copyright Red Hat.

Which issue(s) this PR fixes:

Fixes devfile/api#1242

PR acceptance criteria:

• Test Coverage
  • Are your changes sufficiently tested, and are any applicable test cases added or updated to cover your changes?

Documentation (WIP)

• Does the REST API doc need to be updated with your changes?
• Does the registry library doc need to be updated with your changes?

How to test changes / Special notes to the reviewer:

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (049028b) 35.93% compared to head (f7ca4de) 35.93%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #185   +/-   ##
=======================================
  Coverage   35.93%   35.93%           
=======================================
  Files           7        7           
  Lines        1347     1347           
=======================================
  Hits          484      484           
  Misses        816      816           
  Partials       47       47           

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[michael-valdron]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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