Add missing copyright headers.

[bdice]

Description

While working on #11711, I noticed a set of files that did not have copyright headers in place. This PR fixes them. I used the "start year" from the output of git log indicating the first commit to each file.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (branch-22.10@9c3afc3). Click here to learn what that means.
Patch has no changes to coverable lines.

❗ Current head 57847e4 differs from pull request most recent head 5d5f1eb. Consider uploading reports for the commit 5d5f1eb to get more accurate results

Additional details and impacted files

@@               Coverage Diff               @@
##             branch-22.10   #11712   +/-   ##
===============================================
  Coverage                ?   86.42%           
===============================================
  Files                   ?      145           
  Lines                   ?    23014           
  Branches                ?        0           
===============================================
  Hits                    ?    19890           
  Misses                  ?     3124           
  Partials                ?        0           

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[bdice]

@gpucibot merge