Record special descriptor in REFERENCE_TARGET for type alias object

If a type alias is used to reference an object (companion object) as a
qualifier, record FakeCallableDescriptorForTypeAliasObject in
REFERENCE_TARGET. This tells IDE that type alias was used in the file,
thus, if it's imported, such import isn't redundant.
REFERENCE_TARGET is used mostly by IDE and by ClassifierUsageChecker,
which we also have to update to handle qualifiers with
FakeCallableDescriptorForTypeAliasObject in REFERENCE_TARGET.

Rewrite some parts of ClassifierUsageChecker for cleaner interaction.

 #KT-21863 Fixed Target versions 1.2.40

js/js.translator/src/org/jetbrains/kotlin/js/translate/reference/CompanionObjectIntrinsicAccessTranslator.java

@@ -16,10 +16,10 @@
 
 package org.jetbrains.kotlin.js.translate.reference;
 
-import org.jetbrains.kotlin.js.backend.ast.JsExpression;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.descriptors.ClassDescriptor;
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
+import org.jetbrains.kotlin.js.backend.ast.JsExpression;
 import org.jetbrains.kotlin.js.translate.context.TranslationContext;
 import org.jetbrains.kotlin.js.translate.general.AbstractTranslator;
 import org.jetbrains.kotlin.js.translate.intrinsic.objects.ObjectIntrinsic;

js/js.translator/src/org/jetbrains/kotlin/js/translate/reference/ReferenceTranslator.java

@@ -37,6 +37,7 @@ import org.jetbrains.kotlin.psi.KtExpression;
 import org.jetbrains.kotlin.psi.KtQualifiedExpression;
 import org.jetbrains.kotlin.psi.KtSimpleNameExpression;
 import org.jetbrains.kotlin.resolve.DescriptorUtils;
+import org.jetbrains.kotlin.resolve.calls.util.FakeCallableDescriptorForTypeAliasObject;
 import org.jetbrains.kotlin.types.KotlinType;
 
 import java.util.Arrays;
@@ -220,7 +221,9 @@ public final class ReferenceTranslator {
         DeclarationDescriptor descriptor = getDescriptorForReferenceExpression(context.bindingContext(), simpleNameExpression);
 
         // Skip ValueParameterDescriptor because sometime we can miss resolved call for it, e.g. when set something to delegated property.
-        return descriptor instanceof VariableDescriptor && !(descriptor instanceof ValueParameterDescriptor);
+        return descriptor instanceof VariableDescriptor &&
+               !(descriptor instanceof ValueParameterDescriptor) &&
+               !(descriptor instanceof FakeCallableDescriptorForTypeAliasObject);
     }
 
 }

js/js.translator/src/org/jetbrains/kotlin/js/translate/utils/BindingUtils.java

@@ -28,6 +28,7 @@ import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
 import org.jetbrains.kotlin.resolve.DescriptorUtils;
 import org.jetbrains.kotlin.resolve.calls.callUtil.CallUtilKt;
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
+import org.jetbrains.kotlin.resolve.calls.util.FakeCallableDescriptorForTypeAliasObject;
 import org.jetbrains.kotlin.resolve.constants.CompileTimeConstant;
 import org.jetbrains.kotlin.resolve.constants.evaluate.ConstantExpressionEvaluator;
 import org.jetbrains.kotlin.types.KotlinType;
@@ -129,6 +130,9 @@ public final class BindingUtils {
             }
             return classDescriptor;
         }
+        else if (descriptor instanceof FakeCallableDescriptorForTypeAliasObject) {
+            return ((FakeCallableDescriptorForTypeAliasObject) descriptor).getReferencedObject();
+        }
         else {
             return descriptor;
         }