WIP: Upgrade Kafka dependencies to 2.3.1

[adamkotwasinski]

Description:
Upgrade Kafka client & server dependencies to 2.3.1.
In detail, we generate C++ code from metadata files in Kafka Java client source:

• 2.3 introduced default null value for some fields
• 2.3 introduced sub-structures that have the same name in different requests (e.g. AlterConfigs & IncrementalAlterConfigs have both AlterConfig sub-structures)
• 2.3 introduced a structure that has 10 fields (so need to generate one more composite deserializer)

This PR is the first one in upgrade series, I will need to follow up with upgrade to 2.4, it demands more work than I expected as it includes binary protocol changes described in https://cwiki.apache.org/confluence/display/KAFKA/KIP-482%3A+The+Kafka+Protocol+should+Support+Optional+Tagged+Fields
(tldr: new data types, changed structures, input json files also changed)

Risk Level: Low
Testing:

• unit tests
• integration tests using real Kafka server (2.3.1 as in dependencies) via bazel test //test/extensions/filters/network/kafka/broker/integration_test:kafka_broker_integration_test --runs_per_test 100
• manual testing with 2.3.1 Java Kafka client (on my machine)

Docs Changes: Kafka version mentions in docs
Release Notes: N/A

[adamkotwasinski]

/wait
(client moved to 2.3.1, but 2.4 will need some more python scripting)

[stale]

This pull request has been automatically marked as stale because it has not had activity in the last 7 days. It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[adamkotwasinski]

/assign @mattklein123

[mattklein123]

Thanks!