Native: RedundantCoercionsCleaner should rewrite nested returns too

kotlin-native/backend.native/tests/codegen/inline/redundantCoercionsCleaner.kt

@@ -0,0 +1,17 @@
+package codegen.inline.redundantCoercionsCleaner
+
+import kotlin.test.*
+
+inline fun runAndThrow(action: () -> Unit): Nothing {
+    action()
+    throw Exception()
+}
+
+inline fun foo(): Int = runAndThrow {
+    return 1
+}
+
+@Test fun runTest() {
+    val result: Any = foo()
+    assertEquals(1, result)
+}