[Release-1.27] Revert rke2-ingress-nginx bump back to v1.9.6

[dereknola]

Backport of #6238

Proposed Changes

• Revert back from v1.10.1 to v1.9.6 of ingress-nginx, the arm64 images are not stable.

Types of Changes

Bugfix/revert

Verification

See linked issue

Testing

None of our automated testing covers arm64, nor does upstream have automated arm64 tests

Linked Issues

#6241

User-Facing Change

Further Comments

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@               Coverage Diff               @@
##             release-1.27    #6242   +/-   ##
===============================================
  Coverage                ?   26.11%           
===============================================
  Files                   ?       32           
  Lines                   ?     2684           
  Branches                ?        0           
===============================================
  Hits                    ?      701           
  Misses                  ?     1940           
  Partials                ?       43           

Flag	Coverage Δ
inttests	9.76% <ø> (?)
unittests	18.59% <ø> (?)

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