Previously, the code was calling into
TopDownAnalyzerFacadeForJVM.newModuleSearchScope, which includes
AllJavaSourcesInProjectScope.
This lead to .java-sources being incorrectly attributed to wrong
modules in tests, which, in turn, could've introduced undesired
behaviour around module-dependent checks (e.g. whether a variable
is from the other module and thus can't be smartcasted)