chore: add UNAUTHORIZED case label

[paullatzelsperger]

What this PR changes/adds

Adds the UNAUTHORIZED case label to the ServiceResultHandler, so exceptions can be properly mapped.

Why it does that

Briefly state why the change was necessary.

Further notes

List other areas of code that have changed but are not necessarily linked to the main feature. This could be method
signature changes, package declarations, bugs that were encountered and were fixed inline, etc.

Linked Issue(s)

Closes # <-- insert Issue number if one exists

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 73.59%. Comparing base (7f20ba5) to head (dc428ce).
Report is 148 commits behind head on main.

Files	Patch %	Lines
...se/edc/web/spi/exception/ServiceResultHandler.java	0.00%	6 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4014      +/-   ##
==========================================
+ Coverage   71.74%   73.59%   +1.85%     
==========================================
  Files         919      978      +59     
  Lines       18457    19754    +1297     
  Branches     1037     1113      +76     
==========================================
+ Hits        13242    14538    +1296     
+ Misses       4756     4741      -15     
- Partials      459      475      +16     

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