Ensure ASCII host case normalization happens before validation

[bdraco]

What do these changes do?

Fixes a regression was introduced in #954 that prevented uppercase host names from working

#386 covered some of the paths, but we didn't have coverage for the build path

Are there changes in behavior for the user?

Allows uppercase hosts again

Related issue number

fixes #1441

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 96.08%. Comparing base (65d3aed) to head (b33426d).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
tests/test_url_build.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1442      +/-   ##
==========================================
- Coverage   96.11%   96.08%   -0.04%     
==========================================
  Files          31       31              
  Lines        5876     5882       +6     
  Branches      349      349              
==========================================
+ Hits         5648     5652       +4     
- Misses        202      204       +2     
  Partials       26       26              

Flag	Coverage Δ
CI-GHA	96.08% <71.42%> (-0.04%)	⬇️
MyPy	49.39% <28.57%> (-0.04%)	⬇️
OS-Linux	99.55% <100.00%> (+<0.01%)	⬆️
OS-Windows	99.62% <100.00%> (+<0.01%)	⬆️
OS-macOS	99.30% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	99.28% <100.00%> (+<0.01%)	⬆️
Py-3.10.15	99.51% <100.00%> (+<0.01%)	⬆️
Py-3.11.10	99.51% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	99.28% <100.00%> (+<0.01%)	⬆️
Py-3.12.7	99.51% <100.00%> (+<0.01%)	⬆️
Py-3.13.0	99.51% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	99.24% <100.00%> (+<0.01%)	⬆️
Py-3.9.20	99.47% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.16	99.53% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.17	99.55% <100.00%> (+<0.01%)	⬆️
VM-macos-latest	99.30% <100.00%> (+<0.01%)	⬆️
VM-ubuntu-latest	99.55% <100.00%> (+<0.01%)	⬆️
VM-windows-latest	99.62% <100.00%> (+<0.01%)	⬆️
pytest	99.55% <100.00%> (+<0.01%)	⬆️

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[codspeed-hq]

CodSpeed Performance Report

Merging #1442 will not alter performance

_{Comparing fix_host_validation_upper (b33426d) with master (65d3aed)}

Summary

✅ 85 untouched benchmarks