[Mellanox] Update Mellanox-SN5600-C256S1 buffer calculations (#20991)

- Why I did it
Update buffer calculations for Mellanox-SN5600-C256S1 HwSKU.

- How I did it
Update lossless pool

- How to verify it
Run sonic-mgmt QoS test

Author: noaOrMlnx

device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t0.j2

@@ -16,10 +16,10 @@
     limitations under the License.
 #}
 {% set default_cable = '40m' %}
-{% set ingress_lossless_pool_size =  '115245056' %}
-{% set ingress_lossless_pool_xoff =  '14826496' %}
+{% set ingress_lossless_pool_size =  '142703616' %}
+{% set ingress_lossless_pool_xoff =  '1024' %}
 {% set egress_lossless_pool_size =  '158229504' %}
-{% set egress_lossy_pool_size =  '115245056' %}
+{% set egress_lossy_pool_size =  '142703616' %}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 

device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/buffers_defaults_t1.j2

@@ -15,11 +15,18 @@
     See the License for the specific language governing permissions and
     limitations under the License.
 #}
-{% set default_cable = '300m' %}
-{% set ingress_lossless_pool_size =  '137779200' %}
-{% set ingress_lossless_pool_xoff =  '10092544' %}
+{% set default_cable = '250m' %}
+{% set ingress_lossless_pool_size =  '142703616' %}
+{% set ingress_lossless_pool_xoff =  '1024' %}
 {% set egress_lossless_pool_size =  '158229504' %}
-{% set egress_lossy_pool_size =  '137779200' %}
+{% set egress_lossy_pool_size =  '142703616' %}
+
+{%-set ports2cable = {
+            'torrouter_server'       : '40m',
+            'leafrouter_torrouter'   : '250m',
+            'spinerouter_leafrouter' : '1000m'
+       }
+-%}
 
 {% import 'buffers_defaults_objects.j2' as defs with context %}
 

device/mellanox/x86_64-nvidia_sn5600-r0/Mellanox-SN5600-C256S1/pg_profile_lookup.ini

@@ -49,3 +49,11 @@
  200000  300m 19456   19456  130048        0
  400000  300m 19456   19456  243712        0
  800000  300m 38912   38912  411648        0
+  10000  1000m 19456   19456  24576        0
+  25000  1000m 19456   19456  46080        0
+  40000  1000m 19456   19456  68608        0
+  50000  1000m 19456   19456  83968        0
+ 100000  1000m 19456  19456  168960        0
+ 200000  1000m 19456  19456  308224        0
+ 400000  1000m 19456  19456  610304        0
+ 800000  1000m 38912  38912  1153024       0