Exclude test directories in chunk workflow on.push.paths

If only the test directory for a module changes, we don't really need to build all the chunks dependent on it.

We're calculating the expected on.push.paths in the build module in ProjectChunks.validateChunkWorkflows. We could add exclusions for the test directories of modules that aren't directly part of in the chunk.

We would want to also ensure that no exclusions are present that shouldn't be.