[FLINK-12120][table-planner-blink] Support e2e SortAggregate and HashAggregate operator run in batch mode

[JingsongLi]

What is the purpose of the change

Introduce "select sum(b), count(c) from T group by a" in Blink batch
Finish batch sort agg and batch hash agg.

Brief change log

• Finish BatchExecSortAggregate
• Finish BatchExecHashAggregate
• Add AggITCase
• Add hash exchange to BatchExecExchange
• Finish BatchExecSort
• Fix DecimalAvgAggFunction bug
• Fix agg resultType not use scala implicitly type in AggCodeGenHelper
• Add row type support in CodeGenUtils.hashCodeForType
• Fix setDecimal in CodeGenUtils
• Invoke endInput in close before the introducing of runtime

Verifying this change

ut

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
• The serializers: (no)
• The runtime per-record code paths (performance sensitive): (no)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
• The S3 file system connector: (no)

Documentation

• Does this pull request introduce a new feature? (yes)
• If yes, how is the feature documented? (JavaDocs)

[flinkbot]

Thanks a lot for your contribution to the Apache Flink project. I'm the @flinkbot. I help the community
to review your pull request. We will use this comment to track the progress of the review.

Review Progress

• ❓ 1. The [description] looks good.
• ❓ 2. There is [consensus] that the contribution should go into to Flink.
• ❓ 3. Needs [attention] from.
• ❓ 4. The change fits into the overall [architecture].
• ❓ 5. Overall code [quality] is good.

Please see the Pull Request Review Guide for a full explanation of the review process.

The Bot is tracking the review progress through labels. Labels are applied according to the order of the review items. For consensus, approval by a Flink committer of PMC member is required

Bot commands

The @flinkbot bot supports the following commands:

• @flinkbot approve description to approve one or more aspects (aspects: description, consensus, architecture and quality)
• @flinkbot approve all to approve all aspects
• @flinkbot approve-until architecture to approve everything until architecture
• @flinkbot attention @username1 [@username2 ..] to require somebody's attention
• @flinkbot disapprove architecture to remove an approval you gave earlier

[KurtYoung]

update the title?