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/golden_result/result.swift

@@ -4,10 +4,22 @@ import KotlinRuntime
 public enum namespace {
     public enum deeper {
         public class NAMESPACED_CLASS {
+            public init() {
+                fatalError()
+            }
         }
         public class Foo {
+            public init() {
+                fatalError()
+            }
             public class INSIDE_CLASS {
+                public init() {
+                    fatalError()
+                }
                 public class DEEPER_INSIDE_CLASS {
+                    public init() {
+                        fatalError()
+                    }
                     public func foo() -> Swift.Bool {
                         fatalError()
                     }
@@ -61,9 +73,18 @@ public enum namespace {
         }
     }
     public class NAMESPACED_CLASS {
+        public init() {
+            fatalError()
+        }
     }
     public class Foo {
+        public init() {
+            fatalError()
+        }
         public class INSIDE_CLASS {
+            public init() {
+                fatalError()
+            }
         }
         public func foo() -> Swift.Bool {
             fatalError()
@@ -84,8 +105,24 @@ public enum namespace {
     }
 }
 
+public class ClassWithNonPublicConstructor {
+}
+
 public class Foo {
+    public init(
+        a: Swift.Int32
+    ) {
+        fatalError()
+    }
+    public init(
+        f: Swift.Float
+    ) {
+        fatalError()
+    }
     public class INSIDE_CLASS {
+        public init() {
+            fatalError()
+        }
         public func my_func() -> Swift.Bool {
             fatalError()
         }

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()
-}
+}