Extend import resolution for library-to-source analysis

Use composite importing scope for references when resolution anchors are enabled.
Composite scope provides additional descriptors from scope of resolution anchor module.
Overriding old importing scope with a new one is not possible as it breaks library
dependencies on other libraries, which are inaccessible in anchor scope (scope for sources).

KT-24309 In Progress

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/KotlinIdeResolutionAnchorService.kt

@@ -79,8 +79,11 @@ class KotlinIdeResolutionAnchorService(
 
     override fun getResolutionAnchor(moduleDescriptor: ModuleDescriptor): ModuleDescriptor? {
         if (!project.libraryToSourceAnalysisEnabled) return null
+
         val moduleInfo = moduleDescriptor.moduleInfo ?: return null
-        val mapped = moduleToAnchor[moduleInfo] ?: return null
+        val keyModuleInfo = if (moduleInfo is SourceForBinaryModuleInfo) moduleInfo.binariesModuleInfo else moduleInfo
+        val mapped = moduleToAnchor[keyModuleInfo] ?: return null
+
         return KotlinCacheService.getInstance(project)
             .getResolutionFacadeByModuleInfo(mapped, mapped.platform)
             ?.moduleDescriptor

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/Platform.kt

@@ -250,6 +250,9 @@ private fun MutableMap<AnalysisFlag<*>, Any>.initIDESpecificAnalysisSettings(pro
     if (KotlinMultiplatformAnalysisModeComponent.getMode(project) == KotlinMultiplatformAnalysisModeComponent.Mode.COMPOSITE) {
         put(AnalysisFlags.useTypeRefinement, true)
     }
+    if (KotlinLibraryToSourceAnalysisComponent.isEnabled(project)) {
+        put(AnalysisFlags.libraryToSourceAnalysis, true)
+    }
     put(AnalysisFlags.ideMode, true)
 }