Add isInThePast and isInTheFuture to the missing Java 8 date/time types

[StefanBratanov]

Check List:

• Fixes Consider adding isPast() and isFuture() methods for asserting dates #2932
• Unit tests : YES
• Javadoc with a code example (on API only) : YES
• PR meets the contributing guidelines

• Add the missing assertions for Instant LocalDateTime OffsetDateTime ZonedDateTime since they follow the same patterns. Decided it makes sense to make them one PR.
• Not sure if is necessary to implement invoke_api_method and verify_internal_effects for the ZonedDateTimeAssert and the OffsetDateTimeAssert tests. I implemented them as no-op.

[joel-costigliola]

Integrated thanks @StefanBratanov !