[CIVIS-2263] ENH Add a data type guardrail for `civis.io.civis_file_to_table`

[gkcivis]

• [x] (For Civis employees only) Reference to a relevant ticket in the pull request title
• [x] Changelog entry added to CHANGELOG.md at the repo's root level
• [x] Description of change in the pull request description
• [x] If applicable, unit tests have been added and/or updated
• [x] The CircleCI builds have all passed

Added a data type guardrail in civis.io.civis_file_to_table that raises a type error if file_id is a string.