FIR: make componentX functions operator

compiler/testData/ir/irText/classes/dataClassesGeneric.fir.kt.txt

@@ -9,7 +9,7 @@ data class Test1<T : Any?> {
     field = x
     get
 
-  fun component1(): T {
+  operator fun component1(): T {
     return <this>.#x
   }
 
@@ -55,7 +55,7 @@ data class Test2<T : Number> {
     field = x
     get
 
-  fun component1(): T {
+  operator fun component1(): T {
     return <this>.#x
   }
 
@@ -98,7 +98,7 @@ data class Test3<T : Any?> {
     field = x
     get
 
-  fun component1(): List<T> {
+  operator fun component1(): List<T> {
     return <this>.#x
   }
 
@@ -141,7 +141,7 @@ data class Test4 {
     field = x
     get
 
-  fun component1(): List<String> {
+  operator fun component1(): List<String> {
     return <this>.#x
   }