[LL FIR] rename testdata to testData to avoid copyright generation

We exclude testData pattern from copyright scope

analysis/low-level-api-fir/testData/lazyResolve/classes/hierarchyWithOverrideAndNestedClass4.kt

@@ -0,0 +1,37 @@
+interface Foo1 {
+    fun foo()
+    fun bar()
+    val str: String
+
+    class ClassFromInterface
+}
+
+interface Foo2 : Foo1 {
+    fun foo(i: Int)
+    fun bar(s: String)
+    val isBoo: Boolean
+}
+
+interface Foo3 : Foo1 {
+    fun foo(i: Int)
+    fun bar(s: String)
+    val isBoo: Boolean
+}
+
+abstract class OuterClass : Foo1 {
+    class SimpleNestedClass {
+        fun foo() {
+
+        }
+    }
+
+    abstract class NestedClass : Foo2 {
+        override fun foo() {}
+    }
+
+    abstract class Another<caret>NestedClass : NestedClass() {
+        override fun bar(s: String) {
+
+        }
+    }
+}