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

compiler/testData/diagnostics/tests/operatorRem/preferRemFromCompanionObjectOverRem.fir.kt

@@ -0,0 +1,16 @@
+// !LANGUAGE: -ProhibitOperatorMod
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class A {
+    companion object {
+        operator fun A.rem(x: Int) = 0
+    }
+
+    fun test() {
+        operator fun A.mod(x: Int) = ""
+
+        takeInt(A() % 123)
+    }
+}
+
+fun takeInt(x: Int) {}