Extract Function: Merge jumps with default exits if all exit points are equivalent

#KT-6598 Fixed

idea/testData/refactoring/extractFunction/controlFlow/exitPointEquivalence/defaultAndContinue.kt

@@ -0,0 +1,13 @@
+// PARAM_TYPES: kotlin.Int
+// PARAM_TYPES: kotlin.Int
+// PARAM_DESCRIPTOR: value-parameter val a: kotlin.Int defined in foo
+// PARAM_DESCRIPTOR: val b: kotlin.Int defined in foo
+// SIBLING:
+fun foo(a: Int) {
+    val b: Int = 1
+    for (n in 1..b) {
+        <selection>if (a > 0) throw Exception("")
+        if (a + b > 0) continue
+        println(a - b)</selection>
+    }
+}