[FIR] Mark more calls origin as OPERATOR

compiler/testData/diagnostics/tests/modifiers/operatorInfix/Simple.fir.kt

@@ -28,18 +28,18 @@ fun test() {
     var a = Example()
     val b = Example()
 
-    consumeString(<!ARGUMENT_TYPE_MISMATCH!>a()<!>)
-    consumeString(<!ARGUMENT_TYPE_MISMATCH!>a[1]<!>)
+    consumeString(a())
+    consumeString(a[1])
 
     val (x, y) = Example()
     consumeString(<!ARGUMENT_TYPE_MISMATCH!>x<!>)
     consumeString(<!ARGUMENT_TYPE_MISMATCH!>y<!>)
 
-    consumeExample2(<!ARGUMENT_TYPE_MISMATCH!>++a<!>)
+    consumeExample2(++a)
 
     consumeString(a plus b)
 }
 
 fun consumeInt(i: Int) {}
 fun consumeString(s: String) {}
-fun consumeExample2(e: Example2) {}
+fun consumeExample2(e: Example2) {}