Introduce Time fields in record API, and resolve bug from #7510

[njaremko]

Describe the bug
I recently wrote a PR for #7510 that was wrong. So this is rectifying that.

I had used TimestampMillis for a time value that does not have a date, which is wrong.

I've added two new Fields for the missing concept of "time without date", and fixed the conversion to use them, and added the required trait implementations

To Reproduce
Try to parse a TIME_MILLIS parquet value using current main

Expected behavior
You get a field holding the number of milliseconds since midnight, but instead you'll get a field holding the number of milliseconds since epoch.