e2e: fix EnvoyProxyDaemonSet test

[zirain]

xref: https://github.com/envoyproxy/gateway/actions/runs/15255268202/job/42906197471

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.60%. Comparing base (cbb5381) to head (ecc2eec).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6195      +/-   ##
==========================================
- Coverage   70.61%   70.60%   -0.02%     
==========================================
  Files         219      219              
  Lines       36515    36515              
==========================================
- Hits        25786    25781       -5     
- Misses       9201     9205       +4     
- Partials     1528     1529       +1     

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[zirain]

still failed:

    http.go:240: 2025-05-27T00:32:46.394287533Z: Request failed, not ready yet: Get "http://172.18.0.206/daemonset": dial tcp 172.18.0.206:80: connect: no route to host (after 16.396988886s)

[zirain]

should avoid using gateways with the same name as other tests