KAFKA-20339: Remove assignment offloading configs for 4.3

[squah-confluent]

The KIP-1263 assignment offloading configs aren't fully supported yet
in Apache Kafka 4.3. Remove them to hide them from users.

Reviewers: David Jacot djacot@confluent.io, majialong majialoong@gmail.com, Chia-Ping Tsai chia7712@gmail.com

[chia7712]

LGTM

the page still states the target version is 4.3.0. Should we update it as well?

[chia7712]

Just realized the 4.3 branch isn't triggering CI. Filling a PR to fix this now. FYI @mimaison

[chia7712]

Just realized the 4.3 branch isn't triggering CI. Filling a PR to fix this now.

#21937

[dajac]

lgtm, thanks

[dajac]

@squah-confluent Could you please rebase to include #21937?

[chia7712]

It seems we are mixing the server configs with the original configs, which results in the internal configs being exposed.

We can fix this behavior in the trunk branch. To avoid blocking the 4.3 release, maybe we could just delete that code instead?

[majialoong]

I missed this case. @dajac raised the group internal config concern when I implemented the group synonym support #21855 (comment), but I didn't consider that an internal group config could also have a broker synonym. The createResponseConfig alone can't filter it out in this case. If needed, I can send a follow-up PR to fix this on trunk.

[chia7712]

@majialoong and I discussed this offline, and I agree to handle these internal configs in a separate PR.

However, if we prefer to stick with internal configs for the 4.3 branch for now, fixing it in this PR is absolutely fine.

@majialoong has already pinpointed the critical path."

[squah-confluent]

@chia7712 I've opted to remove the config definitions instead.

[dajac]

@squah-confluent Thanks. Could you please check the build?

[dajac]

@majialoong Let's fix it upstream, as suggested. Thanks!

[chia7712]

we could remove the check from testDynamicGroupCoordinatorConfig to fix it.

BTW, @majialoong I have opened KAFKA-20409 for you

[dajac]

lgtm