[MAINTENANCE] Ignore user warnings for pandas + sqlalchemy

[anthonyburdi]

See comment in the code for more info. Filter and ignore UserWarning when creating tables in test databases for integration testing.

• [ ] Description of PR changes above includes a link to an existing GitHub issue
• [x] PR title is prefixed with one of: [BUGFIX], [FEATURE], [DOCS], [MAINTENANCE], [CONTRIB]
• [x] Code is linted - run invoke lint (uses ruff format + ruff check)
• [x] Appropriate tests and docs have been updated

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