fix: pass loaders to replace_docstring for parser options

[machow]

Addresses #364, by passing in the griffe loader directly, rather than trying to pull parser options off the static object.

TODO:

• pull out loader creation into parsers.py or utils.py, etc.. so easy to use in tests, no duplicated in blueprint
• test the specific case of a docstring not being on the static object

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.45%. Comparing base (4739a4e) to head (9de6e0a).

Files with missing lines	Patch %	Lines
quartodoc/autosummary.py	80.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #365      +/-   ##
==========================================
- Coverage   88.46%   88.45%   -0.02%     
==========================================
  Files          37       37              
  Lines        2931     2936       +5     
==========================================
+ Hits         2593     2597       +4     
- Misses        338      339       +1     

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