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

compiler/testData/codegen/box/multiDecl/forRange/int/MultiDeclForComponentExtensions.kt

@@ -1,5 +1,5 @@
-fun Int.component1() = this + 1
-fun Int.component2() = this + 2
+operator fun Int.component1() = this + 1
+operator fun Int.component2() = this + 2
 
 fun doTest(): String {
     var s = ""

compiler/testData/codegen/box/multiDecl/forRange/int/MultiDeclForComponentExtensionsValCaptured.kt

@@ -1,5 +1,5 @@
-fun Int.component1() = this + 1
-fun Int.component2() = this + 2
+operator fun Int.component1() = this + 1
+operator fun Int.component2() = this + 2
 
 fun doTest(): String {
     var s = ""

compiler/testData/codegen/box/multiDecl/forRange/int/MultiDeclForComponentMemberExtensions.kt

@@ -1,6 +1,6 @@
 class M {
-  fun Int.component1() = this + 1
-  fun Int.component2() = this + 2
+  operator fun Int.component1() = this + 1
+  operator fun Int.component2() = this + 2
 
   fun doTest(): String {
       var s = ""

compiler/testData/codegen/box/multiDecl/forRange/int/MultiDeclForComponentMemberExtensionsInExtensionFunction.kt

@@ -1,6 +1,6 @@
 class M {
-  fun Int.component1() = this + 1
-  fun Int.component2() = this + 2
+  operator fun Int.component1() = this + 1
+  operator fun Int.component2() = this + 2
 }
 
 fun M.doTest(): String {