Add generated code for Kube 1.21, 1.22, and 1.23

[cfryanr]

Add generated code for Kube 1.21, 1.22, and 1.23

Also:

• Make our code generator script work with Go 1.17
• Make our update.sh script work on linux
• Update the patch versions of the old Kube versions that we were using to generate code (see kube-versions.txt)
• Use our container images from ghcr instead of projects.registry.vmware.com for codegen purposes
• Make it easier to debug in the future by passing "-v" to the Kube codegen scripts
• Updated copyright years to make commit checks pass
• Use Go 1.17 to generate the code for all Kube versions... Go version is changed inside the container image used by these scripts, and resulting generated code is included in this PR

Release note:

NONE

[codecov]

Codecov Report

Merging #1040 (58f790c) into main (0c866a6) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1040   +/-   ##
=======================================
  Coverage   79.38%   79.38%           
=======================================
  Files         133      133           
  Lines        9972     9972           
=======================================
  Hits         7916     7916           
  Misses       1786     1786           
  Partials      270      270           

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