KT-65897: add exporting of kotlin constructors as Swift constructors #KT-65897 fixed

Merge-request: KT-MR-14734
Merged-by: Artem Olkov <artem.olkov@jetbrains.com>

native/swift/swift-export-standalone/testData/classes/input_root/classes.kt

@@ -1,5 +1,9 @@
+public class ClassWithNonPublicConstructor internal constructor(public val a: Int)
 
-class Foo {
+class Foo (a: Int) {
+    constructor(f: Float) : this(f.toInt())
+
+    private constructor(d: Double) : this(d.toInt())
     class INSIDE_CLASS {
         fun my_func(): Boolean = TODO()
 

native/swift/swift-export-standalone/testData/classes/input_root/should_be_ignored.kt

@@ -29,4 +29,4 @@ abstract class ABSTRACT_CLASS
 
 sealed class SEALED {
     object O : SEALED()
-}
+}