Python: Add support date, time and datetime in to_bytes

[onerishabh]

• Enable converting objects of date, time and datetime types to bytes.
• Uses pyiceberg/utils/datetime.py functions to convert date/timestamp to epoch microseconds.
• Uses _LONG_STRUCT to pack epoch microseconds.
• Uses _INT_STRUCT to pack number of days since epoch.

Test Cases (epoch microseconds used for testing):

• datetime(2023, 3, 1, 19, 25, 0)
• datetime(2023, 3, 1, 19, 25, 0, tzinfo=timezone.utc)
• date(2023, 3, 1)
• time(12, 30, 45, 500000)

Issue: #8191

[Fokko]

This is great @onerishabh, can you throw in some tests in test_conversions.py?

[onerishabh]

This is great @onerishabh, can you throw in some tests in test_conversions.py?

@Fokko tests added as well

[Fokko]

@onerishabh Sorry, I was not specific about the testing. I think we're super close, but I would love to see tests like:

to_bytes(DateType(), date(1925, 1, 1)) == b"..."

For the date, time and datetime

[onerishabh]

@Fokko , have a look now. Added a new function to do this testing!

[Fokko]

@onerishabh Thanks, exactly the tests that I was looking for, thank you for working on this 🙏🏻

[onerishabh]

Wohoooo 🎉