fix CI issue with Windows python 3.7, 3.9 suspected problem with pyarrow string representation

[cosmicBboy]

Describe the bug A clear and concise description of what the bug is.

• [X] I have checked that this issue has not already been reported.
• ~~[ ] I have confirmed this bug exists on the latest version of pandera.~~
• ~~[ ] (optional) I have confirmed this bug exists on the master branch of pandera.~~

#548 introduced support for pandas==1.3.0 pyarrow-backed string representation. This led to a windows CI issue with python 3.7 and 3.9 which is not straight-forward to reproduce and debug locally (since I don't have a windows machine). The response to this was to disable CI for this subset of the test matrix. This issue tracks fixing this issue and re-enabling CI for windows py3.7/9.

See https://github.com/pandera-dev/pandera/runs/3049735601 for error trace.

Code Sample, a copy-pastable example

NA

Expected behavior

CI should pass for these conditions.