feat: Native Broadcast nested loop join support#4429
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Which issue does this PR close?
Closes #198
Wires Spark's
BroadcastNestedLoopJoinExecto DataFusion'sNestedLoopJoinExec. MarkedIncompatibleso users opt in viaspark.comet.expr.allowIncompatibleRationale for this change
Native support for BroadcastNestedLoopJoin to improve native performance.
What changes are included in this PR?
How are these changes tested?