Revert "[Arista]: Fix TH5 egress pool creation failure with BCM YAML file and SAI update on 07/16 (#19640)" (#20245)

This reverts commit 0344d4a.

Author: Janetxxx

device/arista/x86_64-arista_7060x6_64pe/Arista-7060X6-64PE-256x200G/BALANCED/buffers_defaults_t0.j2

@@ -5,13 +5,13 @@
 {%- macro generate_buffer_pool_and_profiles() %}
     "BUFFER_POOL": {
         "ingress_lossless_pool": {
-            "size": "165603428",
+            "size": "165660324",
             "type": "ingress",
             "mode": "dynamic",
             "xoff": "29520896"
         },
         "egress_lossless_pool": {
-            "size": "165603428",
+            "size": "165660324",
             "type": "egress",
             "mode": "dynamic"
         }