[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/smartcasts/loops/dataFlowInfoFromWhileCondition.kt

@@ -0,0 +1,13 @@
+// !DUMP_CFG
+interface A {
+    fun foo(): Boolean
+}
+interface B : A
+interface C : A
+
+fun test() {
+    var a: A? = null
+    while (a is B || a is C) {
+        a.foo()
+    }
+}