[release-1.30] Fix hosts.toml header var

[brandond]

Proposed Changes

Resolves issue from 270f85e that prevented old hosts.toml files from being cleaned up.

Types of Changes

bugfix

Verification

See linked isse

Testing

Linked Issues

• [Release-1.31] - Custom agent/etc/containerd/certs.d/* files are deleted by k3s on startup #10838

User-Facing Change

Further Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.66%. Comparing base (9e06189) to head (5ba7672).
Report is 1 commits behind head on release-1.30.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.30   #10872      +/-   ##
================================================
- Coverage         48.39%   43.66%   -4.74%     
================================================
  Files               178      178              
  Lines             14931    14931              
================================================
- Hits               7226     6519     -707     
- Misses             6397     7217     +820     
+ Partials           1308     1195     -113     

Flag	Coverage Δ
e2etests	36.42% <ø> (-8.50%)	⬇️
inttests	36.80% <ø> (+0.04%)	⬆️
unittests	13.43% <ø> (ø)

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