TYPING: keywords in df.sort_values and sr.sort_values cannot be annotated
Observed in the PR #30402  and PR #27237 

Annotation seems not to be able to added for `sort_values`. If added, error message will pop up in CI:
```
pandas/core/series.py:2691: error: Signature of "sort_values" incompatible with supertype "NDFrame"
pandas/core/frame.py:4701: error: Signature of "sort_values" incompatible with supertype "NDFrame"
```
