fix: include asar integrity when using --prebuilt-asar

[slashnick]

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• The changes are appropriately documented (if applicable).
• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:

If you are building an app with a prebuilt ASAR archive, we should still include the ASAR integrity hash in the app bundle.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.08%. Comparing base (426b886) to head (6b03d21).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1763      +/-   ##
==========================================
- Coverage   89.28%   89.08%   -0.20%     
==========================================
  Files          17       17              
  Lines         905      907       +2     
  Branches      187      187              
==========================================
  Hits          808      808              
- Misses         61       62       +1     
- Partials       36       37       +1     

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[continuous-auth]

🎉 This PR is included in version 18.3.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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