Update threshold of PG profile for Arista7060X6-PE 256x200G (sonic-net#19642)

* Update threashold of PG profile for 7060x6-64pe

Signed-off-by: Ze Gan <zegan@microsoft.com>

Author: Pterosaur

device/arista/x86_64-arista_7060x6_64pe/Arista-7060X6-64PE-256x200G/BALANCED/pg_profile_lookup.ini

@@ -4,20 +4,20 @@
   25000  5m   1248    2288 53248   0         2288
   40000  5m   1248    2288 66560   0         2288
   50000  5m   1248    2288 90272   0         2288
- 100000  5m   18796   3556 300990  -2        3556
- 200000  5m   18796   3556 300990  -2        3556
- 400000  5m   18796   3556 300990  -2        3556
+ 100000  5m   18796   3556 300990  0        3556
+ 200000  5m   18796   3556 300990  0        3556
+ 400000  5m   18796   3556 300990  0        3556
   10000  40m  1248    2288 37024   0         2288
   25000  40m  1248    2288 53248   0         2288
   40000  40m  1248    2288 71552   0         2288
   50000  40m  1248    2288 96096   0         2288
- 100000  40m  18796   3556 300990  -2        3556
- 200000  40m  18796   3556 300990  -2        3556
- 400000  40m  18796   3556 300990  -2        3556
+ 100000  40m  18796   3556 300990  0        3556
+ 200000  40m  18796   3556 300990  0        3556
+ 400000  40m  18796   3556 300990  0        3556
   10000  300m 1248    2288 46176   0         2288
   25000  300m 1248    2288 79040   0         2288
   40000  300m 1248    2288 108160  0         2288
   50000  300m 1248    2288 141856  0         2288
- 100000  300m 18796   3556 300990  -2        3556
- 200000  300m 18796   3556 300990  -2        3556
- 400000  300m 18796   3556 300990  -2        3556
+ 100000  300m 18796   3556 300990  0        3556
+ 200000  300m 18796   3556 300990  0        3556
+ 400000  300m 18796   3556 300990  0        3556

device/arista/x86_64-arista_7060x6_64pe/Arista-7060X6-64PE-256x200G/th5-a7060x6-64pe.config.bcm

@@ -2461,7 +2461,7 @@ device:
             :
                 MIN_GUARANTEE_CELLS: 74
                 DYNAMIC_SHARED_LIMITS: 1
-                SHARED_LIMIT_DYNAMIC: ALPHA_1_4
+                SHARED_LIMIT_DYNAMIC: ALPHA_1
                 RESUME_OFFSET_CELLS: 14
                 RESUME_FLOOR_CELLS: 0
                 HEADROOM_LIMIT_AUTO: 0
@@ -2472,7 +2472,7 @@ device:
             :
                 MIN_GUARANTEE_CELLS: 74
                 DYNAMIC_SHARED_LIMITS: 1
-                SHARED_LIMIT_DYNAMIC: ALPHA_1_4
+                SHARED_LIMIT_DYNAMIC: ALPHA_1
                 RESUME_OFFSET_CELLS: 14
                 RESUME_FLOOR_CELLS: 0
                 HEADROOM_LIMIT_AUTO: 0
@@ -2483,7 +2483,7 @@ device:
             :
                 MIN_GUARANTEE_CELLS: 0
                 DYNAMIC_SHARED_LIMITS: 1
-                SHARED_LIMIT_DYNAMIC: ALPHA_1_4
+                SHARED_LIMIT_DYNAMIC: ALPHA_1
                 RESUME_OFFSET_CELLS: 0
                 RESUME_FLOOR_CELLS: 0
                 HEADROOM_LIMIT_AUTO: 0
@@ -2494,7 +2494,7 @@ device:
             :
                 MIN_GUARANTEE_CELLS: 0
                 DYNAMIC_SHARED_LIMITS: 1
-                SHARED_LIMIT_DYNAMIC: ALPHA_1_4
+                SHARED_LIMIT_DYNAMIC: ALPHA_1
                 RESUME_OFFSET_CELLS: 0
                 RESUME_FLOOR_CELLS: 0
                 HEADROOM_LIMIT_AUTO: 0