Add test methods and data base on raw fir builder test data

compiler/visualizer/testData/rawBuilder/declarations/simpleClass.kt

@@ -0,0 +1,37 @@
+interface SomeInterface {
+    fun foo(x: Int, y: String): String
+
+//      Boolean
+//      │
+    val bar: Boolean
+}
+
+class SomeClass : SomeInterface {
+//              Int   Int
+//              │     │
+    private val baz = 42
+
+    override fun foo(x: Int, y: String): String {
+//             SomeClass.foo.y: String
+//             │ fun (String).plus(Any?): String
+//             │ │ SomeClass.foo.x: Int
+//             │ │ │ fun (String).plus(Any?): String
+//             │ │ │ │ val (SomeClass).baz: Int
+//             │ │ │ │ │  
+        return y + x + baz
+    }
+
+//               Boolean     
+//               │           
+    override var bar: Boolean
+//              Boolean
+//              │   
+        get() = true
+        set(value) {}
+
+//               Double     
+//               │          
+    lateinit var fau: Double
+}
+
+inline class InlineClass