fix: add validation for new AKS engine Windows Version

[deaborch]

Reason for Change:

I updated the image validation code flow to take into account the new windows vhd details

Issue Fixed:

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[codecov]

Codecov Report

Merging #2896 into master will increase coverage by <.01%.
The diff coverage is 78.57%.

@@            Coverage Diff            @@
##           master   #2896      +/-   ##
=========================================
+ Coverage    72.5%   72.5%   +<.01%     
=========================================
  Files         141     141              
  Lines       25744   25757      +13     
=========================================
+ Hits        18666   18676      +10     
- Misses       5998    5999       +1     
- Partials     1080    1082       +2

[jadarsie]

/lgtm

[mboersma]

/approve

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: deaborch, jadarsie, mboersma

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