Part of #1641.

• Add: 4.3.1
• Mark: 4.2.1 as supported
• Remove: 3.9.1, 4.1.1

Update tasks

Kafka

• Update boil-config.toml to reflect the agreed upon versions in the spreadsheet (including the removal of old versions).
• Upload new version (see kafka/upload_new_kafka_version.sh).
• Update boil-config.toml to the latest supported version of JVM (base and devel).
• Update other dependencies if applicable (eg: jmx_exporter, kcat, scala, etc).
• Check other operators (getting_started / kuttl / supported-versions) for usage of the versions. Add the PR(s) to the list below.
• Update the version in demos. Add the PR(s) to the list below.

kcat and kafka-testing-tools

• Update kcat/boil-config.toml.
• Update kafka-testing-tools/boil-config.toml.
• Upload new version (see .scripts/upload_new_kcat_version.sh).
• Update boil-config.toml to the latest supported version of JVM (base and devel).
• Check other operators (getting_started / kuttl / supported-versions) for usage of the versions. Add the PR(s) to the list below.
• Update the version in demos. Add the PR(s) to the list below.

Related Pull Requests

• chore(kafka): Update major/minor versions for 26.11.0 #1659
• chore(kafka): Update major/minor versions for 26.11.0 kafka-operator#1022
• Link to any other operator PRs (getting_started / kuttl)
• chore(kafka): Update major/minor versions for 26.11.0 demos#450
• Link to the Release Notes PR in the documentation repo (if not a comment below)

Acceptance

• Can build image (either locally, or in CI)
• All kuttl tests pass (either locally, or in CI)
• Release notes added to documentation and linked as a PR above
• Release notes written in a comment below
• Applicable release-note label added to this issue

# Where x.y.z is the new version added in this PR
boil build kafka=x.y.z --strip-architecture --load

# This version doesn't change
boil build kafka-testing-tools=1.0.0 --strip-architecture --load

kind load docker-image oci.stackable.tech/sdp/kafka:x.y.z-stackable0.0.0-dev
kind load docker-image oci.stackable.tech/sdp/kafka-testing-tools:1.0.0-stackable0.0.0-dev

# Change directory into the kafka-operator repository and update the
# product version in tests/test-definition.yaml
./scripts/run-tests --test-suite smoke-latest # or similar

Please consider updating this template if these instructions are wrong, or
could be made clearer.