MINOR: Add 4.0.0 to core system tests

[dajac]

This patch updates all the core system tests to include 4.0.0.

Reviewers: Andrew Schofield aschofield@confluent.io, Lianet Magrans lmagrans@confluent.io

[dajac]

I have triggered a run of the system tests. I will post the results when they are done.

[dajac]

Here is the result of all the system tests: https://confluent-open-source-kafka-branch-builder-system-test-results.s3-us-west-2.amazonaws.com/trunk/2025-03-19--001.525166ce-17a5-49d0-a2c3-972af99ef7ca--1742409351--dajac--minor-update-core-systest-4.0--abd771e77f/report.html.

There are some failures, mainly about the share consumer, but they are not related to the changes made in this PR.

[AndrewJSchofield]

Any reason why you did not include the transactions_mixed_versions_test.py and transactions_upgrade_test.py? Apart from those, this looks to me.

[dajac]

Any reason why you did not include the transactions_mixed_versions_test.py and transactions_upgrade_test.py? Apart from those, this looks to me.

Oops. I missed those two. Let me update them too.

[lianetm]

Similar, should we include streams_broker_compatibility_test.py and streams_application_upgrade_test.py?

[dajac]

Similar, should we include streams_broker_compatibility_test.py and streams_application_upgrade_test.py?

They are handled separately: #19239

[lianetm]

Great, LGTM then, thanks! (let's just check the results of a run with the update)

[dajac]

I ran transactions_mixed_versions_test.py and transactions_upgrade_test.py locally and they both passed.