[FLINK-37128][pipeline-connector/mysql] Binlog reader skip shouldEmit filter when snapshot reader skip backfill

[beryllw]

close FLINK-3712.

Motivation

It takes a long time to filter records to ensure exactly-once but when sink supports at-least-once, we can skip it.
When pipeline sink support at-least-once semantics, we can use scan.incremental.snapshot.backfill.skip to skip shouldEmit filter in binlog replay, which will accelerate binlog replay.

for (FinishedSnapshotSplitInfo splitInfo : finishedSplitsInfo.get(tableId)) {
    if (RecordUtils.splitKeyRangeContains(
                    chunkKey, splitInfo.getSplitStart(), splitInfo.getSplitEnd())
            && position.isAfter(splitInfo.getHighWatermark())) {
        return true;
    }
}