TestE2E/RateLimitGlobalMergeTest/shared_no_client_selectors is flaky

https://github.com/envoyproxy/gateway/actions/runs/21460937493/job/61814032033?pr=8109
```
=== RUN TestE2E/RateLimitGlobalMergeTest/shared_no_client_selectors
ratelimit.go:1289: 2026-01-29T01:16:00.225288661Z: Making GET request to host via http://172.18.0.205:8080/bar
ratelimit.go:1300: 2026-01-29T01:16:00.225313948Z: Making GET request to host via http://172.18.0.205:8080/bar
ratelimit.go:1304: 2026-01-29T01:16:00.225327614Z: Making GET request to host via http://172.18.0.205:8080/bar
http.go:282: 2026-01-29T01:16:00.228485683Z: Request passed
ratelimit.go:1321: failed to exhaust remaining 78 requests: Get "http://172.18.0.205:8080/bar": dial tcp 172.18.0.205:8080: connect: no route to host
ratelimit.go:1327: expected 429 after exhaustion: expected status code to be one of [429], got 200. CRes: &{200 566 HTTP/1.1 map[Content-Length:[566] Content-Type:[application/json] Date:[Thu, 29 Jan 2026 01:16:03 GMT] X-Content-Type-Options:[nosniff] X-Ratelimit-Limit:[100, 100;w=3600] X-Ratelimit-Remaining:[29] X-Ratelimit-Reset:[2637]] []}
```