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Ex : If slf4j-api is upgraded to 2.0.9, we also provide the compatible binding jars of a few backends like logback, log4j, reload4j, commons logging in kafka itself. As we introduce this change in major version 4.0.0, this should be ok for users to upgrade their backend dependencies .Or and we can also provide the compatible backend dependencies.

This way, nothing is broken. Just that they 

Test Plan

Describe in few sentences how the KIP will be tested. We are mostly interested in system tests (since unit-tests are specific to implementation details). How will we know that the implementation works as expected? How will we know nothing broke?

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