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

We exclude testData pattern from copyright scope

analysis/low-level-api-fir/testData/lazyResolve/script2.kts

@@ -0,0 +1,28 @@
+// RESOLVE_SCRIPT
+
+fun f(p: Int?): Int {
+    val fy = p!!
+    val fz = p + 1
+    return fz
+}
+
+fun consume(x: Int) {}
+
+val x: Int? = 1
+
+val y = x!!
+
+val z = x + 1
+
+fun foo() = x + 1
+
+consume(x + 1)
+x!!
+consume(x + 1)
+
+val zz = x + 1
+
+class A {
+    val cz = x + 1
+    fun bar() = x + 1
+}