DebuggerUtils#findSourceFileForClass() doesn't use JetFilesProvider
JetPositionManager#prepareTypeMapper() does not use JetFilesProvider
Drop JetFilesProvider#allPackageFiles() and sampleToAllFilesInModule()
Do not use JetFilesProvider in PositionManagerTestCase
Simplify KotlinCacheService#isFileInScope()
Change AnalyzerFacade#createSetup to accept a list of synthetic files and a scope for physical source files

Make DeclarationProviderFactory a project service
Drop JetFilesProvider service
Change PluginJetFilesProvider.allFilesInProject to a simpler implementation
Drop MigrateSureInProjectFix