[FIR] Report UNSUPPORTED_SEALED_FUN_INTERFACE

^KT-59957 Fixed

compiler/testData/diagnostics/tests/sealed/interfaces/sealedFunInterface.fir.kt

@@ -1,15 +0,0 @@
-sealed fun interface A { // error
-    fun foo()
-}
-
-sealed interface Base {
-    sealed fun interface Derived : Base {  // error
-        fun foo()
-    }
-}
-
-sealed interface IBase {
-    fun interface IDerived : IBase { // OK
-        fun foo()
-    }
-}

compiler/testData/diagnostics/tests/sealed/interfaces/sealedFunInterface.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 <!UNSUPPORTED_SEALED_FUN_INTERFACE!>sealed<!> fun interface A { // error
     fun foo()
 }