FIR: Adjust diagnostics test data after resolution of context receivers

compiler/testData/diagnostics/tests/extensions/contextReceivers/manyReceivers.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !LANGUAGE: +ContextReceivers
 
 class A {
@@ -31,7 +32,7 @@ fun main(a: A, b: B, c: C) {
     }
     with(a) {
         with(c) {
-            <!NO_CONTEXT_RECEIVER!>f()<!>
+            <!NO_CONTEXT_RECEIVER!>f<!>()
         }
     }
-}
+}