Add debug strings to frontend scopes-related structures

Such as:
- PackageFragmentProviders, and, in particular,
CompositePackageFragmentProviders
- JavaPackageFragments
- Scopes produced by those providers

The rationale is that a lot of frontend-facing bugs (like red code) are
easily recognizeable in resolution. But at that point you just see a
bunch of scopes, without meaningful toStrings, you don't know who has
produced them, and what's exactly wrong.

With this commit it should make debugging slightly easier: now at least
you'll be able to see that "this scope is a scope of package fragment
for foo.bar of module baz" and decide whether the declaration should or
should not have been resolved from such scope.

idea/idea-native/src/org/jetbrains/kotlin/ide/konan/NativePlatformKindResolution.kt

@@ -136,7 +136,8 @@ class NativePlatformKindResolution : IdePlatformKindResolution {
                     functionInterfacePackageFragmentProvider(storageManager, builtInsModule),
                     (metadataFactories.DefaultDeserializedDescriptorFactory as KlibMetadataModuleDescriptorFactoryImpl)
                         .createForwardDeclarationHackPackagePartProvider(storageManager, builtInsModule)
-                )
+                ),
+                "CompositeProvider@NativeBuiltins for $builtInsModule"
             )
         )
 

idea/idea-native/src/org/jetbrains/kotlin/ide/konan/analyzer/NativeResolverForModuleFactory.kt

@@ -66,7 +66,10 @@ class NativeResolverForModuleFactory(
             )
 
         if (klibPackageFragmentProvider != null) {
-            packageFragmentProvider = CompositePackageFragmentProvider(listOf(packageFragmentProvider, klibPackageFragmentProvider))
+            packageFragmentProvider = CompositePackageFragmentProvider(
+                listOf(packageFragmentProvider, klibPackageFragmentProvider),
+                "CompositeProvider@NativeResolver for $moduleDescriptor"
+            )
         }
 
         return ResolverForModule(packageFragmentProvider, container)