feat: test v1 recipe.yaml migrations

[wolfv]

I added some tests modeled after the other migration tests.

The matplotlib test currently raises an NotImplemented Error:

            elif isinstance(recipe_yaml, str):
                raise NotImplementedError(
                    "recipe_yaml generic parsing not implemented yet! Ensure the feedstock has .ci_support files."
                )

@beckermr - do we need to do that first? I am not entirely sure what this code does.

[codecov]

Codecov Report

Attention: Patch coverage is 55.11364% with 79 lines in your changes missing coverage. Please review.

Project coverage is 76.09%. Comparing base (228761a) to head (6b670c7).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
tests/test_migrators_v1.py	54.33%	79 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3011      +/-   ##
==========================================
- Coverage   76.26%   76.09%   -0.18%     
==========================================
  Files         118      119       +1     
  Lines       12628    12803     +175     
==========================================
+ Hits         9631     9742     +111     
- Misses       2997     3061      +64     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[beckermr]

@wolfv can you rebase this?

Then I can review.

[wolfv]

Yes, will do tomorrow! (In a few hours)

[wolfv]

@beckermr rebased! :)