Convert temporal column and refresh period to datafusion expr

[y-f-u]

Add a timestamp converter to simplify the logic.
Convert the refresh period logic to expr.

There will be following PR to enable the filter when fetching the data.

Fixes #1175

Edit:
With the merge of #1188 . This allows the period to work properly

  - from: s3://spiceai-demo-datasets/taxi_trips/2024/
    name: taxi_trips
    time_column: tpep_pickup_datetime
    acceleration:
      enabled: true
      refresh_interval: 10m
      refresh_period: 1000w
      refresh_sql: |
        SELECT * FROM taxi_trips WHERE passenger_count = 1;