fix: allow no-marker option to work in pdm export command

[frostming]

Signed-off-by: Frost Ming [email protected]

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

All modified and coverable lines are covered by tests ✅

Project coverage is 85.68%. Comparing base (cfa4913) to head (e58433a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3152      +/-   ##
==========================================
+ Coverage   85.60%   85.68%   +0.07%     
==========================================
  Files         109      109              
  Lines       11044    11049       +5     
  Branches     2413     2415       +2     
==========================================
+ Hits         9454     9467      +13     
+ Misses       1092     1091       -1     
+ Partials      498      491       -7     

Flag	Coverage Δ
unittests	85.48% <100.00%> (+0.07%)	⬆️

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