[action] [PR:22067] [Mellanox] Update SN56xx relevant SKUs buffers_defaults_objects.j2 (#990)

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#### Why I did it
To have buffers updated to new requirements to following SKUs:
Mellanox-SN5600-C256S1
Mellanox-SN5600-C224O8
Mellanox-SN5610N-C256S2
Mellanox-SN5610N-C224O8
Mellanox-SN5640-C512S2
Mellanox-SN5600-C448O16

sonic-mgmt test update: sonic-net/sonic-mgmt#17788

##### Work item tracking
- Microsoft ADO **(number only)**:

#### How I did it
Set port.alpha to 1/64.
Set queue.alpha for queues 1, 2, and 3 to 1.
Set queue.alpha for queue 4 to infinity or 128
#### How to verify it
Load an image with the change on Mellanox system, check SDK dumps and run sonic-mgmt test.
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- [ ] 201911
- [ ] 202006
- [ ] 202012
- [ ] 202106
- [ ] 202111
- [ ] 202205
- [ ] 202211
- [ ] 202305

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- [ ] <!-- image version 1 -->
- [ ] <!-- image version 2 -->

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#### Link to config_db schema for YANG module changes
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Author: mssonicbld

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

@@ -71,7 +71,7 @@
         "ingress_lossy_profile": {
             "pool":"ingress_lossless_pool",
             "size":"0",
-            "dynamic_th":"3"
+            "dynamic_th":"7"
         },
         "egress_lossless_profile": {
             "pool":"egress_lossless_pool",
@@ -81,22 +81,22 @@
         "egress_lossy_profile": {
             "pool":"egress_lossy_pool",
             "size":"9216",
-            "dynamic_th":"7"
+            "dynamic_th":"-6"
         },
         "q_lossy_profile": {
             "pool":"egress_lossy_pool",
             "size":"0",
             "dynamic_th":"0"
         },
-        "q_lossy_minus_7_profile": {
+        "q_lossy_minus_3_profile": {
             "pool": "egress_lossy_pool",
             "size": "0",
-            "dynamic_th" : "-7"
+            "dynamic_th" : "-3"
         },
-        "q_lossy_minus_3_profile": {
+        "q_lossy_infinity_profile": {
             "pool": "egress_lossy_pool",
             "size": "0",
-            "dynamic_th" : "-3"
+            "dynamic_th" : "7"
         }
     },
 {%- endmacro %}
@@ -149,18 +149,13 @@
 {%- macro generate_queue_buffers(port_names_active, port_names_inactive) %}
     "BUFFER_QUEUE": {
 {% for port in port_names_active.split(',') %}
-        "{{ port }}|0": {
+        "{{ port }}|0-3": {
             "profile" : "q_lossy_profile"
         },
 {% endfor %}
-{% for port in port_names_active.split(',') %}
-        "{{ port }}|1-3": {
-            "profile" : "q_lossy_minus_7_profile"
-        },
-{% endfor %}
 {% for port in port_names_active.split(',') %}
         "{{ port }}|4": {
-            "profile" : "q_lossy_profile"
+            "profile" : "q_lossy_infinity_profile"
         },
 {% endfor %}
 {% for port in port_names_active.split(',') %}

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

@@ -167,4 +167,13 @@
     },
 {%- endmacro %}
 
+{%- macro generate_lossless_tc_list(lossless_tc_list) %}
+{#
+    This macro intentionally does nothing, leaving LOSSLESS_TC as an empty list
+    Use the following to generate other lists like 3, 4
+    {%- if lossless_tc_list.append('3') -%}{%- endif -%}
+    {%- if lossless_tc_list.append('4') -%}{%- endif -%}
+#}
+{%- endmacro %}
+
 {%- include 'qos_config.j2' %}