Fix temporary build errors when kiota source files are added/removed

[bkoelman]

This seems to fix the need to build twice when source files are added/removed when running kiota.

QUALITY CHECKLIST

• Changes implemented in code
• Complies with our contributing guidelines
• N/A: Adapted tests
• N/A: Documentation updated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.41%. Comparing base (6ddd7b8) to head (c9dadf7).

Additional details and impacted files

@@             Coverage Diff             @@
##           openapi    #1588      +/-   ##
===========================================
+ Coverage    91.39%   91.41%   +0.02%     
===========================================
  Files          412      412              
  Lines        13438    13438              
  Branches      2100     2100              
===========================================
+ Hits         12281    12284       +3     
+ Misses         751      748       -3     
  Partials       406      406              

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