[FLINK-23402][streaming-java] Simplify shuffle mode for batch execution #16679
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What is the purpose of the change
This simplifies the shuffle mode as discussed in FLINK-23402.
Brief change log
ShuffleMode
->BatchShuffleMode
AUTOMATIC
and makeALL_EXCHANGES_BLOCKING
the default valueexecution.shuffle-mode
toexecution.batch-shuffle-mode
Verifying this change
Existing tests have been updated.
Does this pull request potentially affect one of the following parts:
@Public(Evolving)
: yesDocumentation