LibC: Simplify malloc size classes

Problem:
- `size_classes` is a C-style array which makes it difficult to use in
  algorithms.
- `all_of` algorithm is re-written for the specific implementation.

Solution:
- Change `size_classes` to be an `Array`.
- Directly use the generic `all_of` algorithm instead of
  reimplementing.

Userland/Libraries/LibC/mallocdefs.h

@@ -6,6 +6,8 @@
 
 #pragma once
 
+#include <AK/AllOf.h>
+#include <AK/Array.h>
 #include <AK/InlineLinkedList.h>
 #include <AK/Types.h>
 
@@ -14,18 +16,10 @@
 #define MALLOC_SCRUB_BYTE 0xdc
 #define FREE_SCRUB_BYTE 0xed
 
-static constexpr unsigned short size_classes[] = { 8, 16, 32, 64, 128, 256, 504, 1016, 2032, 4088, 8184, 16376, 32752, 0 };
-static constexpr size_t num_size_classes = (sizeof(size_classes) / sizeof(unsigned short)) - 1;
-
-consteval bool check_size_classes_alignment()
-{
-    for (size_t i = 0; i < num_size_classes; i++) {
-        if ((size_classes[i] % 8) != 0)
-            return false;
-    }
-    return true;
-}
-static_assert(check_size_classes_alignment());
+static constexpr Array<unsigned short, 13> size_classes { 8, 16, 32, 64, 128, 256, 504, 1016, 2032, 4088, 8184, 16376, 32752 };
+static constexpr auto malloc_alignment = 8;
+static_assert(all_of(size_classes.begin(), size_classes.end(),
+    [](const auto val) { return val % malloc_alignment == 0; }));
 
 struct CommonHeader {
     size_t m_magic;