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

We exclude testData pattern from copyright scope

analysis/low-level-api-fir/testData/lazyResolve/fileElements.kt

@@ -0,0 +1,26 @@
+// RESOLVE_FILE
+
+@file:[Deprecated("deprecated file") Anno(1)]
+package one
+
+annotation class Anno(val i: Int)
+
+val a = 1
+val b = 2 + a
+val c = b + a
+
+fun test1() {}
+@Deprecated("")
+@Anno(2)
+fun test2() {}
+
+class A {
+    fun test3() {}
+    @Deprecated("")
+    @Anno(3)
+    fun test4() {}
+}
+
+@Anno(4)
+@Deprecated("")
+class B