Kernel: Make self-contained locking smart pointers their own classes

Until now, our kernel has reimplemented a number of AK classes to
provide automatic internal locking:

- RefPtr
- NonnullRefPtr
- WeakPtr
- Weakable

This patch renames the Kernel classes so that they can coexist with
the original AK classes:

- RefPtr => LockRefPtr
- NonnullRefPtr => NonnullLockRefPtr
- WeakPtr => LockWeakPtr
- Weakable => LockWeakable

The goal here is to eventually get rid of the Lock* classes in favor of
using external locking.

Kernel/Library/NonnullLockRefPtrVector.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/NonnullPtrVector.h>
+#include <Kernel/Library/NonnullLockRefPtr.h>
+
+namespace AK {
+
+template<typename T, size_t inline_capacity>
+class NonnullLockRefPtrVector : public NonnullPtrVector<NonnullLockRefPtr<T>, inline_capacity> {
+    using NonnullPtrVector<NonnullLockRefPtr<T>, inline_capacity>::NonnullPtrVector;
+};
+
+}
+
+using AK::NonnullLockRefPtrVector;