Enforce some pydocstyle lints with flake8-docstrings & docstring fixes in testing/ #7603
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As discussed in #7471, we now have a preferred docstring style. While I was initially reluctant to add lints for the style we settled on, based on past experience, I tried pydocstyle again and it was quite useful, and I changed my mind. So this PR adds flake8-docstrings to our pre-commit setup.
The previous PR #7510 fixed docstring issues in
src/
. Since the lint works on the entire code, this PR also has a commit to fix issues intesting/
.