[FIR] Add test with abstract / non-abstract ambiguity

compiler/fir/resolve/testData/resolve/problems/incorrectSuperCall.kt

@@ -1,10 +1,14 @@
 interface A {
     fun bar() {}
+
+    fun baz()
 }
 open class B {
     open fun foo() {}
 
     open fun bar() {}
+
+    open fun baz() {}
 }
 
 class C : A, B() {
@@ -12,5 +16,8 @@ class C : A, B() {
         super.foo()
 
         super.<!AMBIGUITY!>bar<!>() // should be ambiguity (NB: really we should have overridden bar in C)
+
+        super.<!AMBIGUITY!>baz<!>() // Ok
+        baz()       // Ok
     }
 }

compiler/fir/resolve/testData/resolve/problems/incorrectSuperCall.txt

@@ -3,6 +3,8 @@ FILE: incorrectSuperCall.kt
         public open fun bar(): R|kotlin/Unit| {
         }
 
+        public abstract fun baz(): R|kotlin/Unit|
+
     }
     public open class B : R|kotlin/Any| {
         public constructor(): R|B| {
@@ -15,6 +17,9 @@ FILE: incorrectSuperCall.kt
         public open fun bar(): R|kotlin/Unit| {
         }
 
+        public open fun baz(): R|kotlin/Unit| {
+        }
+
     }
     public final class C : R|A|, R|B| {
         public constructor(): R|C| {
@@ -24,6 +29,8 @@ FILE: incorrectSuperCall.kt
         public final override fun foo(): R|kotlin/Unit| {
             super<R|A|R|B|>.R|/B.foo|()
             super<R|A|R|B|>.<Ambiguity: bar, [/A.bar, /B.bar]>#()
+            super<R|A|R|B|>.<Ambiguity: baz, [/A.baz, /B.baz]>#()
+            this@R|/C|.R|/A.baz|()
         }
 
     }