Fix tests: "infix modifier required" and "operator modifier required" errors

idea/testData/intentions/operatorToFunction/arrayAccessMultipleIndex.kt

@@ -1,5 +1,5 @@
 class Bar {
-    fun get(vararg args: Int) {}
+    operator fun get(vararg args: Int) {}
 }
 
 fun foo(a: Bar, i: Int) {

idea/testData/intentions/operatorToFunction/arrayAccessMultipleIndex.kt.after

@@ -1,5 +1,5 @@
 class Bar {
-    fun get(vararg args: Int) {}
+    operator fun get(vararg args: Int) {}
 }
 
 fun foo(a: Bar, i: Int) {

idea/testData/intentions/operatorToFunction/binaryPlusEquals.kt

@@ -1,5 +1,5 @@
 class Bar {
-    fun plusAssign(arg: Bar) {}
+    operator fun plusAssign(arg: Bar) {}
 }
 
 fun foo(b: Bar) {

idea/testData/intentions/operatorToFunction/binaryPlusEquals.kt.after

@@ -1,5 +1,5 @@
 class Bar {
-    fun plusAssign(arg: Bar) {}
+    operator fun plusAssign(arg: Bar) {}
 }
 
 fun foo(b: Bar) {

idea/testData/intentions/operatorToFunction/functionCallMultipleArgument.kt

@@ -1,5 +1,5 @@
 class bar() {
-    fun invoke(i: Any?, j: Any?) : Boolean {
+    operator fun invoke(i: Any?, j: Any?) : Boolean {
         return true
     }
 }

idea/testData/intentions/operatorToFunction/functionCallMultipleArgument.kt.after

@@ -1,5 +1,5 @@
 class bar() {
-    fun invoke(i: Any?, j: Any?) : Boolean {
+    operator fun invoke(i: Any?, j: Any?) : Boolean {
         return true
     }
 }

idea/testData/intentions/operatorToFunction/functionCallWithMultipleArgumentsAndSingleLambda.kt

@@ -1,5 +1,5 @@
 class Mocha() {
-    fun invoke(x: Int, y: String, f: (Int) -> String) {
+    operator fun invoke(x: Int, y: String, f: (Int) -> String) {
     }
 }
 fun main() {

idea/testData/intentions/operatorToFunction/functionCallWithMultipleArgumentsAndSingleLambda.kt.after

@@ -1,5 +1,5 @@
 class Mocha() {
-    fun invoke(x: Int, y: String, f: (Int) -> String) {
+    operator fun invoke(x: Int, y: String, f: (Int) -> String) {
     }
 }
 fun main() {

idea/testData/intentions/operatorToFunction/functionCallWithSingleLambda.kt

@@ -1,5 +1,5 @@
 class Mocha() {
-    fun invoke(f: (Int) -> String) {}
+    operator fun invoke(f: (Int) -> String) {}
 }
 fun main() {
     val mocha = Mocha()

idea/testData/intentions/operatorToFunction/functionCallWithSingleLambda.kt.after

@@ -1,5 +1,5 @@
 class Mocha() {
-    fun invoke(f: (Int) -> String) {}
+    operator fun invoke(f: (Int) -> String) {}
 }
 fun main() {
     val mocha = Mocha()