Add Arista M0 devices to copp_tests M0 device list

[veronica-arista]

Description of PR

PR https://github.com/sonic-net/sonic-mgmt/pull/12836 changed the copp policer limit for some traffic classes from 300 to 100 for all DUTs except M0. Add Arista M0 devices to the test's M0 list.

Summary: Fixes # (issue)

Type of change

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

Back port request

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

Approach

What is the motivation for this PR?

Copp tests were failing on Arista M0 devices due to the policer limit change.

How did you do it?

How did you verify/test it?

Copp tests pass on Arista M0 devices with this fix.

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation