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

We exclude testData pattern from copyright scope

analysis/low-level-api-fir/testData/partialRawBuilder/localFunction.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+// FUNCTION: bar
+
+package test.locals
+
+class Owner {
+    fun foo(i: Int) {
+        var x = true
+
+        fun bar() {
+            baz(i, x)
+        }
+    }
+
+    fun baz(j: Int, y: Boolean) {}
+}