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

We exclude testData pattern from copyright scope

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

@@ -0,0 +1,14 @@
+// MEMBER_CLASS_FILTER: org.jetbrains.kotlin.fir.symbols.impl.FirFieldSymbol
+package one
+
+class Boo
+
+interface Foo {
+    fun foo(b: Boo)
+}
+
+class Usa<caret>ge(prop: Foo) : Foo by prop {
+    fun baz(s: String) {
+
+    }
+}