[202311] skip headroom pool test for Force10-S6100 T1 topo

[XuChen-MSFT]

Description of PR

Summary: Fixes # (issue)

Type of change

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

Back port request

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

Approach

What is the motivation for this PR?

manually double commit PR https://github.com/sonic-net/sonic-mgmt/pull/12266 for 202311 branch to resolve merge conflicts

How did you do it?

fix conflicts

How did you verify/test it?

Any platform specific information?

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

Documentation