[FIR/AA decompiler] Add tests for sealed interfaces

^KT-62895

compiler/testData/loadJava/compiledKotlin/class/SealedInterface.fir.txt

@@ -0,0 +1,17 @@
+public final class Inheritor2 : R|test/SealedInterface| {
+    public constructor(): R|test/Inheritor2|
+
+}
+
+public final class Inheritor3 : R|test/SealedInterface| {
+    public constructor(): R|test/Inheritor3|
+
+}
+
+public sealed interface SealedInterface : R|kotlin/Any| {
+    public final class Inheritor1 : R|test/SealedInterface| {
+        public constructor(): R|test/SealedInterface.Inheritor1|
+
+    }
+
+}

compiler/testData/loadJava/compiledKotlin/class/SealedInterface.kt

@@ -0,0 +1,9 @@
+package test
+
+class Inheritor3 : SealedInterface
+
+sealed interface SealedInterface {
+    class Inheritor1 : SealedInterface
+}
+
+class Inheritor2 : SealedInterface

compiler/testData/loadJava/compiledKotlin/class/SealedInterface.txt

@@ -0,0 +1,16 @@
+package test
+
+public final class Inheritor2 : test.SealedInterface {
+    /*primary*/ public constructor Inheritor2()
+}
+
+public final class Inheritor3 : test.SealedInterface {
+    /*primary*/ public constructor Inheritor3()
+}
+
+public sealed interface SealedInterface {
+
+    public final class Inheritor1 : test.SealedInterface {
+        /*primary*/ public constructor Inheritor1()
+    }
+}