Fix compiler tests

compiler/testData/diagnostics/tests/inline/unaryExpressions/notOperation.kt

@@ -1,5 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -NOTHING_TO_INLINE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -RECURSION_IN_INLINE
-inline fun <T, V> Function1<T, V>.not() : Boolean {
+inline operator fun <T, V> Function1<T, V>.not() : Boolean {
     return !this
 }
 
@@ -7,11 +7,11 @@ inline fun <T, V> inlineFunWithInvoke(s: (p: T) -> V) {
     !s
 }
 
-fun <T, U, V> Function2<T, U, V>.not() : Boolean {
+operator fun <T, U, V> Function2<T, U, V>.not() : Boolean {
     return !this
 }
 
-fun <T, U, V, W> @Extension Function3<T, U, V, W>.not() : Boolean {
+operator fun <T, U, V, W> @Extension Function3<T, U, V, W>.not() : Boolean {
     return !this
 }