[release-1.27] Fix windows airgap image packaging

[brandond]

Proposed Changes

Fix windows airgap image packaging

Change to image source for airgap was missed from #4829 - airgap no longer contained the same images as RKE2 actually uses on Windows.

Types of Changes

bugfix

Verification

Check windows airgap tarball
Install windows airgap cluster

Testing

Linked Issues

• [Release-1.27] - Windows air-gap images.txt listing missing images #6584

User-Facing Change

Further Comments

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 25.82%. Comparing base (1fb8e9e) to head (29e6c1f).

Additional details and impacted files

@@              Coverage Diff              @@
##           release-1.27    #6588   +/-   ##
=============================================
  Coverage         25.82%   25.82%           
=============================================
  Files                32       32           
  Lines              2722     2722           
=============================================
  Hits                703      703           
  Misses             1974     1974           
  Partials             45       45           

Flag	Coverage Δ
inttests	9.62% <ø> (ø)
unittests	18.40% <ø> (ø)

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