Remove constraints containing stub types after completion of the common system of a builder inference call

^KT-49285 Fixed

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

@@ -94,6 +94,11 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
         return this is StubTypeForBuilderInference || isDefNotNullStubType<StubTypeForBuilderInference>()
     }
 
+    override fun StubTypeMarker.getOriginalTypeVariable(): TypeVariableTypeConstructorMarker {
+        require(this is AbstractStubType, this::errorMessage)
+        return this.originalTypeVariable as TypeVariableTypeConstructorMarker
+    }
+
     override fun CapturedTypeMarker.lowerType(): KotlinTypeMarker? {
         require(this is NewCapturedType, this::errorMessage)
         return this.lowerType