Add Span<T>.Sort(...) by changing Array.Sort internals to be Span based

src/System.Private.CoreLib/shared/System/Array.cs

@@ -1544,8 +1544,8 @@ public static void Sort<T>(T[] array, int index, int length, System.Collections.
                     }
                 }
 #endif
-
-                ArraySortHelper<T>.Default.Sort(array, index, length, comparer);
+                var span = new Span<T>(ref Unsafe.As<byte, T>(ref array.GetRawArrayData()), array.Length);
+                ArraySortHelper<T>.Default.Sort(span, index, length, comparer!);
             }
         }
 
@@ -1578,7 +1578,9 @@ public static void Sort<TKey, TValue>(TKey[] keys, TValue[]? items, int index, i
                     return;
                 }
 
-                ArraySortHelper<TKey, TValue>.Default.Sort(keys, items, index, length, comparer);
+                var spanKeys = new Span<TKey>(ref Unsafe.As<byte, TKey>(ref keys.GetRawArrayData()), keys.Length);
+                var spanItems = new Span<TValue>(ref Unsafe.As<byte, TValue>(ref items!.GetRawArrayData()), items!.Length); // TODO-NULLABLE: Remove ! when [DoesNotReturn] respected
+                ArraySortHelper<TKey, TValue>.Default.Sort(spanKeys, spanItems, index, length, comparer);
             }
         }
 
@@ -1594,7 +1596,8 @@ public static void Sort<T>(T[] array, Comparison<T> comparison)
                 ThrowHelper.ThrowArgumentNullException(ExceptionArgument.comparison);
             }
 
-            ArraySortHelper<T>.Sort(array!, 0, array!.Length, comparison!); // TODO-NULLABLE: Remove ! when [DoesNotReturn] respected
+            var span = new Span<T>(ref Unsafe.As<byte, T>(ref array!.GetRawArrayData()), array!.Length); // TODO-NULLABLE: Remove ! when [DoesNotReturn] respected
+            ArraySortHelper<T>.Sort(span, 0, span.Length, comparison!); // TODO-NULLABLE: Remove ! when [DoesNotReturn] respected
         }
 
         public static bool TrueForAll<T>(T[] array, Predicate<T> match)