[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/labels/automaticLabelFromInfixOperator.fir.kt

@@ -0,0 +1,17 @@
+fun test(x: List<Int>): Int {
+    x myMap {
+        return@myMap
+    }
+
+    return 0
+}
+
+fun myMap(x: List<Int>): Int {
+    x myMap {
+        return@myMap
+    }
+
+    return 0
+}
+
+infix fun List<Int>.myMap(x: () -> Unit) {}