[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/controlStructures/kt657.fir.kt

@@ -0,0 +1,20 @@
+//KT-657 Semantic checks for when without condition
+package kt657
+
+class Pair<A, B>(a: A, b: B)
+
+fun foo() =
+    when {
+        cond1() -> 12
+        cond2() -> 2
+        4 -> 34
+        Pair(1, 2) -> 3
+        in 1..10 -> 34
+        4 -> 38
+        is Int -> 33
+        else -> 34
+    }
+
+fun cond1() = false
+
+fun cond2() = true