[chore] Cleanup chloggen globalCfg usage

[djaglowski]

This is a subset of #372 which will make that PR easier to review.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.02% ⚠️

Comparison is base (4216b12) 62.08% compared to head (053dfeb) 62.07%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #376      +/-   ##
==========================================
- Coverage   62.08%   62.07%   -0.02%     
==========================================
  Files          48       48              
  Lines        2345     2344       -1     
==========================================
- Hits         1456     1455       -1     
  Misses        741      741              
  Partials      148      148              

Files Changed	Coverage Δ
chloggen/cmd/root.go	63.88% <100.00%> (-0.98%)	⬇️
chloggen/internal/chlog/entry.go	81.53% <100.00%> (ø)
chloggen/internal/config/config.go	100.00% <100.00%> (ø)

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