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

We exclude testData pattern from copyright scope

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

@@ -0,0 +1,13 @@
+import kotlin.reflect.KClass
+
+annotation class AnotherAnnotation
+enum class EnumClass {
+    First, Second
+}
+
+annotation class Anno(val str: String, val ann: AnotherAnnotation, val c: KClass<*>, val entry: EnumClass)
+
+@Deprecated(boo()) @Anno("123", AnotherAnnotation(), AnotherAnnotation::class, EnumClass.Second)
+fun f<caret>oo() {
+
+}