Type Approximation: add separate flag to control approx. anonymous type

This extra flexibility is useful for IDE where we always want to
approximate anonymous types but may not want to approximate other local
 types

core/compiler.common/src/org/jetbrains/kotlin/types/model/TypeSystemContext.kt

@@ -377,6 +377,7 @@ interface TypeSystemContext : TypeSystemOptimizationContext {
     fun TypeConstructorMarker.isInterface(): Boolean
     fun TypeConstructorMarker.isIntegerLiteralTypeConstructor(): Boolean
     fun TypeConstructorMarker.isLocalType(): Boolean
+    fun TypeConstructorMarker.isAnonymous(): Boolean
     fun TypeConstructorMarker.getTypeParameterClassifier(): TypeParameterMarker?
 
     val TypeVariableTypeConstructorMarker.typeParameter: TypeParameterMarker?

core/descriptors/src/org/jetbrains/kotlin/types/checker/ClassicTypeSystemContext.kt

@@ -15,6 +15,7 @@ import org.jetbrains.kotlin.descriptors.impl.AbstractTypeParameterDescriptor
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.FqNameUnsafe
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.name.SpecialNames
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.calls.inference.CapturedType
 import org.jetbrains.kotlin.resolve.constants.IntegerLiteralTypeConstructor
@@ -44,6 +45,11 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
         return declarationDescriptor?.classId?.isLocal == true
     }
 
+    override fun TypeConstructorMarker.isAnonymous(): Boolean {
+        require(this is TypeConstructor, this::errorMessage)
+        return declarationDescriptor?.classId?.shortClassName == SpecialNames.ANONYMOUS
+    }
+
     override val TypeVariableTypeConstructorMarker.typeParameter: TypeParameterMarker?
         get() {
             require(this is NewTypeVariableConstructor, this::errorMessage)