[Release-1.34] Migrate release pipelines 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 21.92%. Comparing base (b7627ae) to head (69e5063).

❗ There is a different number of reports uploaded between BASE (b7627ae) and HEAD (69e5063). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (b7627ae)	HEAD (69e5063)
e2etests	1	0

Additional details and impacted files

@@                Coverage Diff                @@
##           release-1.34   #13119       +/-   ##
=================================================
- Coverage         47.02%   21.92%   -25.11%     
=================================================
  Files               189      186        -3     
  Lines             15235    15167       -68     
=================================================
- Hits               7165     3326     -3839     
- Misses             6885    11404     +4519     
+ Partials           1185      437      -748     

Flag	Coverage Δ
e2etests	?
unittests	21.92% <ø> (+0.02%)	⬆️

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