[SPARK-28416][SQL] Use java.time API in timestampAddInterval

[MaxGekk]

What changes were proposed in this pull request?

The DateTimeUtils.timestampAddInterval method was rewritten by using Java 8 time API. To add months and microseconds, I used the plusMonths() and plus() methods of ZonedDateTime. Also the signature of timestampAddInterval() was changed to accept an ZoneId instance instead of TimeZone. Using ZoneId allows to avoid the conversion TimeZone -> ZoneId on every invoke of timestampAddInterval().

How was this patch tested?

By existing test suites DateExpressionsSuite, TypeCoercionSuite and CollectionExpressionsSuite.

[srowen]

Looks Ok pending tests.

[SparkQA]

Test build #107758 has finished for PR 25173 at commit 9eaffa7.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[srowen]

Merged to master