FIR: Update test data (repeated diagnostics)

They are a bit redundant, but it needs additional work to be done
to avoid them

compiler/testData/diagnostics/tests/scopes/inheritance/methodsPriority.fir.kt

@@ -20,7 +20,7 @@ fun test() {
 
     class B: A() {
         init {
-            val a: Int = <!INITIALIZER_TYPE_MISMATCH!>foo()<!> // todo
+            val a: Int = <!INITIALIZER_TYPE_MISMATCH, TYPE_MISMATCH!>foo()<!> // todo
         }
     }
 }
@@ -31,4 +31,4 @@ class E: A() {
     init {
         val a: A = foo() // todo: discuss
     }
-}
+}