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

We exclude testData pattern from copyright scope

analysis/low-level-api-fir/testData/lazyResolve/classMembersScript.kts

@@ -0,0 +1,17 @@
+class A {
+    fun resolve<caret>Me() {
+        receive(functionWithLazyBody())
+    }
+
+    val x: Int = 10
+        get() = field
+        set(value) {
+            field = value
+        }
+
+    fun receive(value: String) {}
+
+    fun functionWithLazyBody(): String {
+        return "42"
+    }
+}