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

compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/callSite/exceptionTableSplit.2.kt

@@ -2,7 +2,7 @@ package test
 
 public class Holder(var value: String = "") {
 
-    public fun plusAssign(s: String?) {
+    operator fun plusAssign(s: String?) {
         if (value.length() != 0) {
             value += " -> "
         }

compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/callSite/exceptionTableSplitNoReturn.2.kt

@@ -2,7 +2,7 @@ package test
 
 public class Holder(var value: String = "") {
 
-    public fun plusAssign(s: String?) {
+    operator fun plusAssign(s: String?) {
         if (value.length() != 0) {
             value += " -> "
         }

compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/exceptionTable/exceptionInFinally.1.kt

@@ -6,7 +6,7 @@ import kotlin.test.fail
 class MyException(message: String) : Exception(message)
 
 class Holder(var value: String) {
-    public fun plusAssign(s: String?) {
+    operator fun plusAssign(s: String?) {
         value += s
         if (s != "closed") {
             value += "->"

compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/exceptionTable/tryCatchInFinally.2.kt

@@ -2,7 +2,7 @@ package test
 
 public class Holder(var value: String = "") {
 
-    public fun plusAssign(s: String?) {
+    operator fun plusAssign(s: String?) {
         if (value.length() != 0) {
             value += " -> "
         }

compiler/testData/codegen/boxInline/smap/resolve/inlineComponent.2.kt

@@ -2,8 +2,8 @@ package zzz
 
 public class A(val a: Int, val b: Int)
 
-inline fun A.component1() = a
+operator inline fun A.component1() = a
 
-inline fun A.component2() = b
+operator inline fun A.component2() = b
 
 //SMAP ABSENT

compiler/testData/codegen/boxInline/smap/resolve/inlineIterator.2.kt

@@ -2,6 +2,6 @@ package zzz
 
 public class A(val p: Int)
 
-inline fun A.iterator() = (1..p).iterator()
+operator inline fun A.iterator() = (1..p).iterator()
 
 //SMAP ABSENT

compiler/testData/codegen/boxInline/special/plusAssign.2.kt

@@ -2,6 +2,6 @@ package test
 
 public class Z(public var s: Int)
 
-inline fun Z.plusAssign(lambda: () -> Int)  {
+operator inline fun Z.plusAssign(lambda: () -> Int)  {
     this.s += lambda()
 }