Kotlin: Add a Kotlin 2 copy of the testsuite

java/ql/test-kotlin2/query-tests/ConstantLoopCondition/A.kt

@@ -0,0 +1,24 @@
+fun fn0(f: Function0<Unit>) = f()
+
+fun fn1() {
+    var c = true
+    while (c) { // TODO: false positive
+        fn0 {
+            c = false
+        }
+    }
+
+    var d = true
+    while (d) {
+        fn0 {
+            println(d)
+        }
+    }
+
+    val e = true
+    while (e) {
+        fn0 {
+            println(e)
+        }
+    }
+}