[Release-1.33] Migrate release pipeline into GitHub Actions

[dereknola]

Proposed Changes

Backports of:

• Migrate dispatch pipeline into GitHub Actions #13105
• Migrate K3s DockerHub image publishing from Drone to GitHub Actions #13129

Types of Changes

Verification

Testing

Linked Issues

#12136

User-Facing Change

Further Comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 21.53%. Comparing base (29b9a7b) to head (4bc942f).

❗ There is a different number of reports uploaded between BASE (29b9a7b) and HEAD (4bc942f). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (29b9a7b)	HEAD (4bc942f)
e2etests	1	0

Additional details and impacted files

@@                Coverage Diff                @@
##           release-1.33   #13116       +/-   ##
=================================================
- Coverage         46.26%   21.53%   -24.73%     
=================================================
  Files               190      187        -3     
  Lines             15487    15419       -68     
=================================================
- Hits               7165     3321     -3844     
- Misses             7135    11661     +4526     
+ Partials           1187      437      -750     

Flag	Coverage Δ
e2etests	?
unittests	21.53% <ø> (-0.02%)	⬇️

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