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

#KT-6598 Fixed

idea/testData/refactoring/extractFunction/controlFlow/exitPointEquivalence/defaultAndBreak.kt.after

@@ -0,0 +1,18 @@
+// 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) {
+        if (b(a, b)) break
+    }
+}
+
+private fun b(a: Int, b: Int): Boolean {
+    if (a > 0) throw Exception("")
+    if (a + b > 0) return true
+    println(a - b)
+    return false
+}