[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/copy.kt

@@ -0,0 +1,8 @@
+data class Some(val x: Int, val y: String)
+
+fun test(some: Some) {
+    val other = some.copy(y = "123")
+    val another = some.copy(x = 123)
+    val same = some.copy()
+    val different = some.copy(456, "456")
+}