Add intensive testing of nested-pandas cloud IO

[hombit]

Feature request

It would be really nice to test (and maybe benchmark) edge cases for nested_pandas.read_parquet, for example, reading recursively from an S3 "directory tree." I've found that IPAC's Euclid Q1 catalog is really good for that because it has leaf directories and a lot of smaller files. See, for example, this directory s3://nasa-irsa-euclid-q1/contributed/q1/merged_objects/hats/euclid_q1_merged_objects-hats/dataset/Norder=7/.

Related to and blocked by lincc-frameworks/nested-pandas#393

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