test/ginkgo: ensure admin server port is not selected dynamically

[sam-heilbron]

Description

Always skip 9095. when selecting a port dynamically

Context

The issue holds the context. It caused issues for me running tests locally, where requests were sent to the Gloo admin server instead of my local proxy. As a result, the test failed locally and caused toil trying to debug, when the issue was that it was sending the request to the wrong backend.

Testing steps

Run all tests:

TEST_PKG=./test/e2e INVALID_TEST_REQS=skip make test

in the logs, you will see:

Retrying because : port 9095 is in deny list

and the next EnvoyInstance uses 9096.

Notes for reviewers

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[solo-changelog-bot]

Issues linked to changelog:
https://github.com/solo-io/solo-projects/issues/7307

[github-actions]

Visit the preview URL for this PR (updated for commit 5cd9011):

https://gloo-edge--pr10406-sh-safe-ports-e2e-5zdtl8ef.web.app

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[ryanrolds]

Should all of the 8xxx and 9xxx ports be skipped?

[sam-heilbron]

Hitting flakes that #10409 should address