[Backport 2.19-dev] Support chart command in PPL (#4579)

[yuancu]

Description

Backport #4579 to 2.19-dev

Commit Message

• WIP: Make poc implementation for chart command

• Support param useother and otherstr

• Support usenull and nullstr (when both row split and col split present)

• Append a final aggregation to merge OTHER categories

• Handle common agg functions for OTHER category for timechart

• Fix timechart IT

• Sort earliest results with asc order

• Support non-string fields as column split

• Fix min/earliest order & fix non-accumulative agg for chart

• Hint non-null in aggregateWithTrimming

• Add integration tests for chart command

• Add unit tests

• Add doc for chart command

• Prompt users that multiple agg is not supported

• Add explain ITs

• Remove unimplemented support for multiple aggregations in chart command

• Add unit tests for chart command

• Remove irrelevant yaml test

• Tweak chart.rst

• Swap the order of chart output to ensure metrics come last

• Filter rows without col split when calculate grand total

• Chores: tweak code order

• Add anonymize test to chart command

• Change grammart from limit=top 10 to limit=top10

• Update chart doc

• Rename row_number for chart to row_number_chart

• Sort by row and col splits on top of chart results

• Ignore rows without a row split in chart command

• Keep categories with max summed values when top k is set

• Simplify toAddHintsOnAggregate condition

• Chores: eliminate unnecessary variables

• Apply a non-null filter on fields referred by aggregations

• Fix chart plans

• Get rid of record class

• Move ranking by column split to a helper function

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(cherry picked from commit 5523932)

Related Issues

Resolves #399

Check List

• New functionality includes testing.
• New functionality has been documented.
• New functionality has javadoc added.
• New functionality has a user manual doc added.
• New PPL command checklist all confirmed.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff or -s.
• Public documentation issue/PR created.

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