[action] [PR:13111] [Arista] Add Quicksilver HW SKUs

Summary: Add the Arista Quicksilver HWSKUs (Arista-7060X6-64DE and Arista-7060X6-64PE and related variants) to the new TH5 ansible variables list.

Type of change

[ ] Bug fix
[ ] Testbed and Framework(new/improvement)
[x] Test case(new/improvement)

Back port request

[ ] 201911
[ ] 202012
[ ] 202205
[ ] 202305
[x] 202311
[x] 202405

Approach

What is the motivation for this PR?

Add the missing HWSKUs for Arista Quicksilver platforms.

How did you verify/test it?

Built the image and installed it on the product.

Any platform specific information?

Arista-7060X6-64DE Arista-7060X6-64DE-64x400G Arista-7060X6-64DE-256x200G Arista-7060X6-64PE Arista-7060X6-64PE-64x400G Arista-7060X6-64PE-128x400G Arista-7060X6-64PE-256x200G

sonic-net / sonic-mgmt