KT-11018 Ctrl + Mouse Hover shows a var as val

#KT-11018 Fixed

idea/testData/refactoring/extractFunction/parameters/misc/extensionLambdaAsParameter.kt.after

@@ -1,5 +1,5 @@
 // PARAM_TYPES: kotlin.String.() -> T
-// PARAM_DESCRIPTOR: value-parameter val f: kotlin.String.() -> T defined in test
+// PARAM_DESCRIPTOR: value-parameter f: kotlin.String.() -> T defined in test
 fun <T> test(f: String.() -> T): T {
     return t(f)
 }