[action] [PR:23429] TH5-512 ingress and egress lossy queue buffer size change (sonic-net#1391)

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#### Why I did it

BRCM SAI 13.2.1 increases the pkt trim buffer pool to 1.7MB, leading to
the reduction of available lossy queue buffer.

Without this change, there will be a syncd crash on default buffer
profile pairing with SAI 13.2.1.

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

#### How I did it

Reduce default ingress and egress lossy buffer size from 164624512 to
162910774

#### How to verify it

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- [x] 202412
- [ ] 202205
- [ ] 202211
- [ ] 202305
- [ ] 202311
- [ ] 202405
- [ ] 202411
- [ ] 202505

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#### Description for the changelog
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BRCM SAI 13.2.1 increases the pkt trim buffer pool to 1713738 bytes,
available lossy queue buffer size to be reduced accordingly.

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Author: mssonicbld

device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t0.j2

@@ -5,12 +5,12 @@
 {%- macro generate_buffer_pool_and_profiles() %}
     "BUFFER_POOL": {
         "ingress_lossy_pool": {
-            "size": "164624512",
+            "size": "162910774",
             "type": "ingress",
             "mode": "dynamic"
         },
         "egress_lossy_pool": {
-            "size": "164624512",
+            "size": "162910774",
             "type": "egress",
             "mode": "dynamic"
         }

device/arista/x86_64-arista_7060x6_64pe_b/Arista-7060X6-64PE-B-C448O16/buffers_defaults_t1.j2

@@ -5,12 +5,12 @@
 {%- macro generate_buffer_pool_and_profiles() %}
     "BUFFER_POOL": {
         "ingress_lossy_pool": {
-            "size": "164624512",
+            "size": "162910774",
             "type": "ingress",
             "mode": "dynamic"
         },
         "egress_lossy_pool": {
-            "size": "164624512",
+            "size": "162910774",
             "type": "egress",
             "mode": "dynamic"
         }