[ENHANCEMENT] Implement incremental unit tests

[hamza-m-masood]

Describe the use case:

Implement incremental unit tests where only the components impacted by a particular change are tested.

Describe the enhancement/feature:

This means if a PR only affects the Zeebe component, there is no need to run the entire suite of unit tests for other components like Identity.

Desired outcome and acceptance tests:

If a change is made on one component in a particular version, then only the unit tests of that component within that particular version should run.
For example, if I made a change to the zeebe component in 8.3, then only the unit tests for zeebe should run for 8.3.