STYLE: Extending codespell to pandas/tests
- [X] xref #38802
- [X] tests added / passed
- [X] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [ ] whatsnew entry

Nice, thanks @01-vyom for doing this!

This changes lots of files though, could you please split it up into smaller PRs? Maybe 3 PRs doing about 20 files each? Ok, will do that Made all the necessary changes. I made the second PR with other files, as both of these PRs are merged I will make the final PR. Nice, thanks! There's some (unrelated to this PR) issue with CI though, will revisit once that's fixed Hi @01-vyom can you fetch and merge upstream/master please? Thanks @01-vyom !