e2e: skip flaky test

[stevvooe]

- What I did

Test failed in https://github.com/docker/cli/actions/runs/13958201073/job/39074237116?pr=5858. Skipping this rather than keep a test that doesn't provide value.

- How I did it

t.Skip at top of test.

- How to verify it

See that the test shows as skipped.

- Human readable description for the release notes

- A picture of a cute animal (not mandatory but encouraged)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.45%. Comparing base (b199ece) to head (4a80c6d).
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5945      +/-   ##
==========================================
+ Coverage   59.43%   59.45%   +0.02%     
==========================================
  Files         358      358              
  Lines       29765    29765              
==========================================
+ Hits        17690    17698       +8     
+ Misses      11111    11102       -9     
- Partials      964      965       +1     

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[thaJeztah]

LGTM

yeah, let's skip this one. not sure what's causing this, but I somewhat suspect tests running in parallel using the same port. We're very likely gonna deprecate the client-side docker content trust, so not worth investing time into debugging.