[AURON #2062] AuronKafkaSourceFunction support generating watermarks

[Tartarus0zm]

Which issue does this PR close?

Closes #2062

Rationale for this change

• auron kafka source support flink watermark

What changes are included in this PR?

• modify AuronKafkaSourceFunction, Assign tasks to their corresponding Kafka partitions and generate watermark
• modify kafka_scan_exec.rs, Consume the list of kafka partitions passed from the Java side
• add KafkaTopicPartitionAssigner , copy from flink
• add SourceContextWatermarkOutputAdapter , copy from flink

Are there any user-facing changes?

• No

How was this patch tested?

• There is currently no Kafka environment integration, so automated testing is not possible.

[Tartarus0zm]

@richox CI is green, PTAL