fix: do not validate against locked groups in lock command

[frostming]

Signed-off-by: Frost Ming me@frostming.com

Pull Request Checklist

• A news fragment is added in news/ describing what is new.
• Test cases added for changed code.

Describe what you have changed in this PR.

Close #1796

[codecov-commenter]

Codecov Report

Patch coverage: 89.74% and project coverage change: -0.01 ⚠️

Comparison is base (146daa2) 85.13% compared to head (8494645) 85.13%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1797      +/-   ##
==========================================
- Coverage   85.13%   85.13%   -0.01%     
==========================================
  Files          99       99              
  Lines        8974     8985      +11     
  Branches     1946     1947       +1     
==========================================
+ Hits         7640     7649       +9     
- Misses        907      908       +1     
- Partials      427      428       +1     

Flag	Coverage Δ
unittests	84.95% <89.74%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/pdm/cli/commands/fix/__init__.py	72.22% <0.00%> (ø)
src/pdm/core.py	90.69% <89.65%> (+0.37%)	⬆️
src/pdm/cli/actions.py	77.58% <100.00%> (-0.35%)	⬇️
src/pdm/cli/commands/base.py	100.00% <100.00%> (ø)
src/pdm/cli/filters.py	92.64% <100.00%> (+0.10%)	⬆️
src/pdm/signals.py	100.00% <100.00%> (ø)

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