[MAINTENANCE] Move table_factory to top-level conftest

[tyler-hoffman]

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

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 65.54%. Comparing base (8acf6af) to head (c3dcb14).

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #9804       +/-   ##
============================================
- Coverage    82.37%   65.54%   -16.83%     
============================================
  Files          505      503        -2     
  Lines        45328    45326        -2     
============================================
- Hits         37338    29709     -7629     
- Misses        7990    15617     +7627     

Flag	Coverage Δ
3.10	65.54% <ø> (ø)
3.11	65.54% <ø> (ø)
3.11 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	?
3.11 aws_deps	?
3.11 big	?
3.11 databricks	?
3.11 filesystem	?
3.11 mssql	?
3.11 mysql	?
3.11 postgresql	?
3.11 snowflake	?
3.11 spark	?
3.11 trino	?
3.8	65.55% <ø> (ø)
3.8 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	?
3.8 aws_deps	?
3.8 big	?
3.8 databricks	?
3.8 filesystem	?
3.8 mssql	?
3.8 mysql	?
3.8 postgresql	?
3.8 snowflake	?
3.8 spark	?
3.8 trino	?
3.9	65.54% <ø> (ø)
cloud	?
docs-basic	?
docs-creds-needed	?
docs-spark	?

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