Update years in license headers

[air-31]

This PR updates all license headers in Go files inside the operators directory.

The modifications were done with the help of a custom script since the addlicense tool, which was made use of in the Makefile, wasn't working as expected. The update includes files starting with 'zz_generated', since they were not ignored in the Makefile command.

[kingmakerbot]

Hi @air-31. Thanks for your PR.

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Make sure this PR appears in the CrownLabs changelog, adding one of the following labels:

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[QcFe]

thanks!

[QcFe]

/merge