AT:

• the integration tests can be executed in parallel with a hardcoded split defined in excludesFiles

Context:
While adding more and more tests to Optimize, the test execution pipeline tends to take a very long time. Therefore, it makes sense to parallelize the execution so that developers don't have to wait for a very long time until they get a result.

The follow-up ticket OPT-2191 will handle the splitting of the tests in a not hardcoded fashion.