[spark] Support partition sink strategy for Format Table

[Zouxxyy]

Purpose

Support spark.paimon.partition.sink-strategy for Paimon format tables in Spark.

• Let format-table writes expose RequiresDistributionAndOrdering.
• Require clustered distribution by partition columns for non-none strategies.
• Add coverage for the none and hash strategies with a Hive-backed Paimon format table.

Tests

• mvn -pl paimon-spark/paimon-spark-ut -Pspark3,fast-build -DfailIfNoTests=false -Dtest=none -DwildcardSuites=org.apache.paimon.spark.sql.FormatTableWriteDistributeModeTest test
• mvn -pl paimon-spark/paimon-spark-ut -Pspark3,fast-build -DfailIfNoTests=false -Dtest=none -DwildcardSuites=org.apache.paimon.spark.sql.WriteDistributeModeTest test

[JingsongLi]

+1