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?