Implement `timeout` option for `seek`

[jonashaag]

Description

Here the timeout option is hardcoded as -1 and not surfaced to the Python API.

confluent-kafka-python/src/confluent_kafka/src/Consumer.c

Line 817 in e671bcc

err = rd_kafka_seek(rkt, tp->partition, tp->offset, -1);

Would be great to be able to set timeout in this API. https://docs.confluent.io/2.0.0/clients/librdkafka/rdkafka_8h.html#a6667b162931982e9827e3d86ad22ec7d

How to reproduce

Checklist

Please provide the following information:

• confluent-kafka-python and librdkafka version (confluent_kafka.version() and confluent_kafka.libversion()):
• Apache Kafka broker version:
• Client configuration: {...}
• Operating system:
• Provide client logs (with 'debug': '..' as necessary)
• Provide broker log excerpts
• Critical issue

[edenhill]

Out of curiosity; are you seeing seek() blocking for more than a couple of milliseconds?

[jonashaag]

Out of curiosity; are you seeing seek() blocking for more than a couple of milliseconds?

Oh wow, actually I assumed that -1 meant async but 0 means async and -1 means blocking without timeout.

Then there is another reason that my seek() calls sometimes take a while to materialize.

So, to answer your question, the seek() calls are always really quick (so quick that I don't need the timeout setting implemented), but sometimes they seem to not have any effect for some time.