Property ads_insights_age_and_gender.date_{start,stop} missing 'date-time'

[mandrews]

The property definition for ads_insights_platform_and_device.date_start contains "format" "date-time" and the resulting BigQuery field has type TIMESTAMP. For a similar schema, ads_insights_age_and_gender.date_start this "format" is missing and the resulting BigQuery field has type STRING. The "format" is also missing for ads_insights_age_and_gender.date_stop .