[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/smartcasts/kt37327.kt

@@ -0,0 +1,14 @@
+// ISSUE: KT-37327
+
+interface Q
+
+sealed class A : Q
+
+class B(val x: Int) : A()
+
+fun Q.foo() {
+    if (this !is A) return
+    when (this) {
+        is B -> x // unresolved
+    }
+}