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 :warning:

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Additional details and impacted files

```diff @@ 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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