Update tokio-tungstenite and rustls in test-helpers

[rukai]

rustls needs to be updated at the same time since its part of tokio-tungstenite's public API

Changes might look complicated but they are entirely within test logic and is the equivalent to the upgrade we did within shotover itself in https://github.com/shotover/shotover-proxy/pull/1387

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #1712 will not alter performance

_{Comparing rukai:update_rustls_tungstenite (67e6457) with main (9bc0a89)}

Summary

✅ 39 untouched benchmarks