chore: add e2e tests for argocd-agent web-based terminal feature

[jparsai]

This PR is to add e2e tests for argocd-agent web-based terminal, since gitops-operator tests run on OCP, it is goot to verify that agent features work on OCP without any issue.

/kind enhancement

Assisted by: Cursor

ArgoCD Agent PR having fix for web-terminal in OCP argoproj-labs/argocd-agent#848

[openshift-ci]

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[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

@jparsai: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v4.14-kuttl-sequential	f5b6fe5	link	false	/test v4.14-kuttl-sequential
ci/prow/v4.19-kuttl-sequential	f5b6fe5	link	true	/test v4.19-kuttl-sequential

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