chore: VDX-339 improve error handling definitionVersionDiscovery

[sanderPostma]

I am not a fan of returning Record<string, unknown> as error type. You still can't see what's coming back.
I had types generated for ValidationError

[codecov]

Codecov Report

Attention: Patch coverage is 95.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.06%. Comparing base (be27cde) to head (c235d89).

Files with missing lines	Patch %	Lines
lib/utils/VCUtils.ts	90.90%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #175      +/-   ##
===========================================
+ Coverage    89.95%   90.06%   +0.11%     
===========================================
  Files           66       66              
  Lines         2718     2729      +11     
  Branches       705      711       +6     
===========================================
+ Hits          2445     2458      +13     
+ Misses         255      253       -2     
  Partials        18       18              

Flag	Coverage Δ
unittest	90.06% <95.00%> (+0.11%)	⬆️

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