[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/smartcasts/smartCastInInit.kt

@@ -0,0 +1,15 @@
+// !DUMP_CFG
+interface I
+interface S : I {
+    fun foo()
+}
+
+fun s(): S = TODO()
+
+class Main {
+    private val x: I
+    init {
+        x = s()
+        x.foo()
+    }
+}