Pipe: aggregate tablets with different measurements under the same device before write into tsfile

[VGalaxies]

As title.

[SteveYurongSu]

@luoluoyuyu PTAL

[Copilot]

Pull Request Overview

This PR introduces logic to aggregate tablets with matching measurement criteria before writing them into tsfiles, which is aimed at optimizing the writing process for devices with various measurement data.

• Added a new method, tryBestToAggregateTablets, to aggregate tablets while maintaining consistent timestamps, row sizes, and maximum row numbers.
• Updated the logic in tryBestToWriteTabletsIntoOneFile to leverage tablet aggregation.
• Streamlined lambda expressions in integration tests for both push and pull consumer scenarios.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/connector/util/builder/PipeTreeModelTsFileBuilder.java	Added aggregation logic and incorporated it into the tablet writing process.
integration-test/src/test/java/org/apache/iotdb/subscription/it/triple/regression/pushconsumer/multi/IoTDBConsumer2With1TopicShareProcessTsfileIT.java	Simplified lambda assertion blocks.
integration-test/src/test/java/org/apache/iotdb/subscription/it/triple/regression/pullconsumer/multi/IoTDBConsumer2With1TopicShareProcessTsfileIT.java	Simplified lambda assertion blocks.

Comments suppressed due to low confidence (1)

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/connector/util/builder/PipeTreeModelTsFileBuilder.java:199

• [nitpick] Consider renaming the method tryBestToAggregateTablets to a more descriptive name such as aggregateTabletsMatchingCriteria to better convey its purpose.

private Tablet tryBestToAggregateTablets(