FIX: Convert Times back to strings to handle when times are greater than midnight

[huangh]

asana_ticket

Times are in String HH:MM:SS format, from glides https://mbta.github.io/schemas/events/glides/com.mbta.ctd.glides.trips_updated.v1#time

This is not valid when converted to hyper times. Those have a valid range of 00:00:00 - 24:00:00
https://tableau.github.io/hyper-db/docs/sql/datatype/datetime

Returning back to strings to match existing handling.

[rymarczy]

🍰

[github-actions]

LCOV of commit 11c6269 during Continuous Integration (Python) #969

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Files changed coverage rate:
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  src/lamp_py/tableau/jobs/glides.py                                                 |39.7%     73|    -     0|    -      0