fix(registry): use scw.eu endpoint for it-mil region login

[jremy42]

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Relates OR Closes #0000

Release note for CHANGELOG:

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.36%. Comparing base (92f3db2) to head (0642dec).
⚠️ Report is 14 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5772      +/-   ##
==========================================
+ Coverage   50.11%   50.36%   +0.24%     
==========================================
  Files         344      345       +1     
  Lines       79025    79791     +766     
==========================================
+ Hits        39603    40186     +583     
- Misses      37926    38114     +188     
+ Partials     1496     1491       -5     

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[remyleone]

I would prefer have something systematic performed on the server side rather than introducing complexities on our side.