IR: slightly fix kotlin-like dumping of super qualifiers

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

@@ -20,7 +20,7 @@ class K2 : JFoo {
   }
 
   override fun foo(): String {
-    return super.foo() /*!! String */
+    return super<JFoo>.foo() /*!! String */
   }
 
 }
@@ -42,7 +42,7 @@ class K4 : JUnrelatedFoo, IFoo {
   }
 
   override fun foo(): @FlexibleNullability String? {
-    return super.foo()
+    return super<JUnrelatedFoo>.foo()
   }
 
 }
@@ -121,3 +121,4 @@ class TestK4 : IFoo {
   local /* final field */ val <$$delegate_0>: K4 = K4()
 
 }
+