Return an error if both license scanning and local/offline scanning is enabled simultaneously

[another-rex]

When --local-db or --offline flags are passed in the user expects no requests containing individual packages to be made to an external service.

[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (dd26cdc) 78.86% compared to head (f20fb30) 78.82%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
pkg/osvscanner/osvscanner.go	25.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #703      +/-   ##
==========================================
- Coverage   78.86%   78.82%   -0.04%     
==========================================
  Files          84       84              
  Lines        5943     5946       +3     
==========================================
  Hits         4687     4687              
- Misses       1054     1056       +2     
- Partials      202      203       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.