fix: revert broken depend-a-bot commits

[hallyn]

My bad: I merged some dependabot commits earlier this month which broke builds. Some should be fixable, but some will take some work, especially as the v2 docker distribution still uses reference.SplitHostname, which has been removed (see k3s-io/k3s#12397 for another example).

With these 5 reverted, it at least builds again.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.41%. Comparing base (39e4af2) to head (3123848).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #707   +/-   ##
=======================================
  Coverage   60.41%   60.41%           
=======================================
  Files          59       59           
  Lines        6444     6444           
=======================================
  Hits         3893     3893           
  Misses       1906     1906           
  Partials      645      645           

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