fix: respect project path when using cookiecutter template in pdm init command

[frostming]

Fix #3721

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.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 85.92%. Comparing base (1d31c8d) to head (a46f663).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/pdm/cli/commands/init.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3728      +/-   ##
==========================================
+ Coverage   85.91%   85.92%   +0.01%     
==========================================
  Files         118      118              
  Lines       12372    12370       -2     
  Branches     2061     2060       -1     
==========================================
  Hits        10629    10629              
+ Misses       1170     1168       -2     
  Partials      573      573              

Flag	Coverage Δ
unittests	85.78% <0.00%> (+0.01%)	⬆️

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