Spark 4.1: Display write metrics on SQL UI

[manuzhang]

Port PR #13253 from Spark 4.0 to Spark 4.1 to enable write metrics display on the Spark SQL UI.

[Copilot]

Pull request overview

This PR ports write metrics display functionality from Spark 4.0 to Spark 4.1, enabling write operation metrics to be shown in the Spark SQL UI. The changes introduce custom metric classes for tracking various write operations and integrate them with Spark's connector API.

Changes:

• Added 25 new custom metric classes extending CustomSumMetric to track data files, delete files, records, and file sizes for added/removed/total categories
• Integrated metrics reporting into SparkWrite and SparkPositionDeltaWrite by implementing reportDriverMetrics() and supportedCustomMetrics()
• Enhanced BaseTable to support combining multiple metrics reporters

Reviewed changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
TotalRecords.java	Defines metric for tracking total record count
TotalPositionalDeletes.java	Defines metric for tracking total positional deletes
TotalFileSizeInBytes.java	Defines metric for tracking total file size
TotalEqualityDeletes.java	Defines metric for tracking total equality deletes
TotalDeleteFiles.java	Defines metric for tracking total delete files
TotalDataFiles.java	Defines metric for tracking total data files
RemovedRecords.java	Defines metric for tracking removed records
RemovedPositionalDeletes.java	Defines metric for tracking removed positional deletes
RemovedPositionalDeleteFiles.java	Defines metric for tracking removed positional delete files
RemovedFileSizeInBytes.java	Defines metric for tracking removed file size
RemovedEqualityDeletes.java	Defines metric for tracking removed equality deletes
RemovedEqualityDeleteFiles.java	Defines metric for tracking removed equality delete files
RemovedDeleteFiles.java	Defines metric for tracking removed delete files
RemovedDataFiles.java	Defines metric for tracking removed data files
AddedRecords.java	Defines metric for tracking added records
AddedPositionalDeletes.java	Defines metric for tracking added positional deletes
AddedPositionalDeleteFiles.java	Defines metric for tracking added positional delete files
AddedFileSizeInBytes.java	Defines metric for tracking added file size
AddedEqualityDeletes.java	Defines metric for tracking added equality deletes
AddedEqualityDeleteFiles.java	Defines metric for tracking added equality delete files
AddedDeleteFiles.java	Defines metric for tracking added delete files
AddedDataFiles.java	Defines metric for tracking added data files
SparkWriteBuilder.java	Adds custom metrics support to write builder
SparkWrite.java	Integrates metrics reporter and implements reportDriverMetrics()
SparkPositionDeltaWrite.java	Integrates metrics reporter and implements custom metrics methods
SparkWriteUtil.java	Provides utility methods for creating custom metrics and task metrics
InMemoryMetricsReporter.java	Adds commitReport() method to retrieve commit metrics
BaseTable.java	Adds combineMetricsReporter() method for combining metrics reporters

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