[SPARK] Fix streaming writer overwriting batch data by scoping OVERWRITE_BY_FILTER to batch only#7458
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…ITE_BY_FILTER to batch only
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Fixes #7457
…ITE_BY_FILTER to batch only
Purpose
Linked issue: close #7457
Tests
API and Format
Documentation
Generative AI tooling
Note: There is no valid streaming use case for OVERWRITE_BY_FILTER.
Streaming overwrites are already handled explicitly via OutputMode.Complete()
in PaimonSink.scala. Advertising OVERWRITE_BY_FILTER to streaming writers
serves no purpose and only introduces this destructive side effect during
writer initialization.