[K/N] Move kotlin.native.internal.Debugging into kotlin.native.runtime

As a part of efforts to stabilize Native stdlib #KT-55765.

kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/Debugging.kt

@@ -7,13 +7,14 @@ package kotlin.native.internal
 /*
  * Internal utilities for debugging K/N compiler and runtime.
  */
-public object Debugging {
-    public var forceCheckedShutdown: Boolean
-        get() = Debugging_getForceCheckedShutdown()
-        set(value) = Debugging_setForceCheckedShutdown(value)
 
-    public val isThreadStateRunnable: Boolean
-        get() = Debugging_isThreadStateRunnable()
+@OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
+@Deprecated("Use kotlin.native.runtime.Debugging instead.", ReplaceWith("Debugging", "kotlin.native.runtime.Debugging"))
+@DeprecatedSinceKotlin(warningSince = "1.9")
+public object Debugging {
+    public var forceCheckedShutdown: Boolean by kotlin.native.runtime.Debugging::forceCheckedShutdown
+
+    public val isThreadStateRunnable: Boolean by kotlin.native.runtime.Debugging::isThreadStateRunnable
 }
 
 @GCUnsafeCall("Kotlin_Debugging_isPermanent")
@@ -23,12 +24,3 @@ public external fun Any.isPermanent() : Boolean
 @GCUnsafeCall("Kotlin_Debugging_isLocal")
 @InternalForKotlinNative
 public external fun Any.isLocal() : Boolean
-
-@GCUnsafeCall("Kotlin_Debugging_getForceCheckedShutdown")
-private external fun Debugging_getForceCheckedShutdown(): Boolean
-
-@GCUnsafeCall("Kotlin_Debugging_setForceCheckedShutdown")
-private external fun Debugging_setForceCheckedShutdown(value: Boolean): Unit
-
-@GCUnsafeCall("Kotlin_Debugging_isThreadStateRunnable")
-private external fun Debugging_isThreadStateRunnable(): Boolean

kotlin-native/runtime/src/main/kotlin/kotlin/native/runtime/Debugging.kt

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.native.runtime
+
+import kotlin.native.internal.GCUnsafeCall
+import kotlin.native.internal.InternalForKotlinNative
+
+/**
+ * __Note__: this API is unstable and may change in any release.
+ *
+ * A set of utilities for debugging Kotlin/Native runtime.
+ */
+@NativeRuntimeApi
+@SinceKotlin("1.9")
+public object Debugging {
+    /**    
+     * Run full checked deinitialization on shutdown.
+     *
+     * Make sure that after exiting `main()` only a single thread with Kotlin runtime remains.
+     * Run GC collecting everything including globals.
+     *
+     * When enabled together with [Platform.isCleanersLeakCheckerActive] additionally checks that no cleaners get executed after `main()`
+     */
+    public var forceCheckedShutdown: Boolean
+        get() = Debugging_getForceCheckedShutdown()
+        set(value) = Debugging_setForceCheckedShutdown(value)
+
+    /**
+     * Whether the current thread's state allows running Kotlin code.
+     *
+     * Used by Kotlin/Native internal tests.
+     * If it returns `false`, it's a bug.
+     */
+    @InternalForKotlinNative
+    public val isThreadStateRunnable: Boolean
+        get() = Debugging_isThreadStateRunnable()
+}
+
+
+@GCUnsafeCall("Kotlin_Debugging_getForceCheckedShutdown")
+private external fun Debugging_getForceCheckedShutdown(): Boolean
+
+@GCUnsafeCall("Kotlin_Debugging_setForceCheckedShutdown")
+private external fun Debugging_setForceCheckedShutdown(value: Boolean): Unit
+
+@GCUnsafeCall("Kotlin_Debugging_isThreadStateRunnable")
+private external fun Debugging_isThreadStateRunnable(): Boolean