Change the way of runtime configuration in JsePsiUnifierTest

idea/testData/unifier/equivalence/controlStructures/whenWithSubjectRuntime.kt

@@ -0,0 +1,29 @@
+fun foo(a: Int, b: Int) {
+    <selection>when((a)) {
+        1 -> println(b)
+        (2) -> println((a - b))
+        else -> println(a + b)
+    }</selection>
+
+    when(a) {
+        1 -> println(b)
+        2 -> println(a - b)
+    }
+
+    when {
+        a == 1 -> println(b)
+        a == 2 -> println(a - b)
+        else -> println(a + b)
+    }
+
+    when(a) {
+        1 -> println(b)
+        2 -> println(a - b)
+        else -> println(a + b)
+    }
+
+    when(a) {
+        2 -> println(a - b)
+        1 -> println(b)
+    }
+}