[SPARK-27879][SQL] Add support for bit_and and bit_or aggregates

[yaooqinn]

What changes were proposed in this pull request?

bit_and(expression) -- The bitwise AND of all non-null input values, or null if none
bit_or(expression) -- The bitwise OR of all non-null input values, or null if none

More details:
https://www.postgresql.org/docs/9.3/functions-aggregate.html

Why are the changes needed?

Postgres, Mysql and many other popular db support them.

Does this PR introduce any user-facing change?

add two bit agg

How was this patch tested?

add ut

[SparkQA]

Test build #112250 has finished for PR 26155 at commit b6c246e.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
• case class BitAndAgg(child: Expression) extends DeclarativeAggregate with ExpectsInputTypes
• case class BitOrAgg(child: Expression) extends DeclarativeAggregate with ExpectsInputTypes

[yaooqinn]

cc @cloud-fan @wangyum, thanks

[SparkQA]

Test build #112266 has finished for PR 26155 at commit 58b99e9.

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

[cloud-fan]

LGTM

[SparkQA]

Test build #112355 has finished for PR 26155 at commit e91c364.

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

[cloud-fan]

thanks, merging to master!