[Mellanox] Remove SKU ACS-SN4280 (#21809)

- Why I did it
Every ACS-.....SKU is expected to have ingress_lossy pool but SKU ACS-SN4280 does not contain it. So removing the ACS SKU to make it compliant.

- How I did it
Removed the symlinks in Mellanox-SN4280-O28 folder and added the required files.

- How to verify it
Generated config using Mellanox-SN4280-O28 SKU and tested on the device

Signed-off-by: ram25794 <ssingamala@nvidia.com>

Author: ram25794

device/mellanox/x86_64-mlnx_msn4700-r0/Mellanox-SN4700-O28/buffers_defaults_objects.j2

@@ -1,5 +1,6 @@
 {#
-    Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
+    SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
+    Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
     Apache-2.0
 
     Licensed under the Apache License, Version 2.0 (the "License");

device/mellanox/x86_64-mlnx_msn4700-r0/Mellanox-SN4700-O32/pg_profile_lookup.ini

@@ -1 +1 @@
-../../x86_64-nvidia_sn4280-r0/ACS-SN4280/pg_profile_lookup.ini
+../Mellanox-SN4700-O8C48/pg_profile_lookup.ini

device/mellanox/x86_64-mlnx_msn4700-r0/Mellanox-SN4700-V64/pg_profile_lookup.ini

@@ -1 +1 @@
-../../x86_64-nvidia_sn4280-r0/ACS-SN4280/pg_profile_lookup.ini
+../Mellanox-SN4700-O8C48/pg_profile_lookup.ini