fix(scw): include attempted locality in resource not found errors (#1)

[alesr]

Hi team 👋

This PR fixes #2403 by adding attempted locality (zone/region) to not-found errors.

- locality is propagated from request path to error handling
- ResourceNotFoundError now includes locality (and shows it in the message)
- tests were added/updated

[codecov-commenter]

Codecov Report

❌ Patch coverage is 80.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 3.62%. Comparing base (25895fc) to head (1450bab).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
scw/errors.go	77.77%	3 Missing and 1 partial ⚠️
scw/client.go	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #2944      +/-   ##
=========================================
+ Coverage    3.57%   3.62%   +0.04%     
=========================================
  Files         159     159              
  Lines       51647   51668      +21     
=========================================
+ Hits         1847    1873      +26     
+ Misses      49513   49508       -5     
  Partials      287     287              

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