feat(time): Replace time.Time with time.Duration for Go type

[kavirajk]

Summary

Currently time and time64 types are treated as Go's time.Time for inserts and scan.

This causes lots of complexity and bad UX for users.

1. We have to deal with Day, Month and Year eventhough that is not part of original CH time and time64 types
2. Handling timezone. Which is also not part of CH types.

Having coming up with "sane" zero values is super cumbersome. Plus it's going to be bad UX for developers if want to do some arithmetic on those types.

This PR converts that to more sane time.Duration type. This type fits naturally to CH time and time64 types.

Also see this comment

Checklist

Delete items not relevant to your PR:

• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided to include in CHANGELOG
• For significant changes, documentation in https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials