Bump tests/perf/s2n-quic from c64faf9 to ff81604 (#4306)

Bumps [tests/perf/s2n-quic](https://github.com/aws/s2n-quic) from
`c64faf9` to `ff81604`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/aws/s2n-quic/commit/ff81604a78b897b6ae01f53e210a4c88ff1193cf"><code>ff81604</code></a>
opt(s2n-quic-dc): skip epoll registration in happy path (<a
href="https://redirect.github.com/aws/s2n-quic/issues/2754">#2754</a>)</li>
<li><a
href="https://github.com/aws/s2n-quic/commit/bd9ee3edc80738d5cb6fe9ee7bc9ee06b2ad344e"><code>bd9ee3e</code></a>
feat(s2n-quic-dc): implement dcQUIC control (<a
href="https://redirect.github.com/aws/s2n-quic/issues/2755">#2755</a>)</li>
<li><a
href="https://github.com/aws/s2n-quic/commit/4d3d94f2cb89085cb8eeff58ac5203ceaef6c54b"><code>4d3d94f</code></a>
feat(s2n-quic-dc): implement dcQUIC's server, client, and io providers
(<a
href="https://redirect.github.com/aws/s2n-quic/issues/2752">#2752</a>)</li>
<li><a
href="https://github.com/aws/s2n-quic/commit/a2ad54e05e0109467e22c829899861e699c5b6e5"><code>a2ad54e</code></a>
build(deps): bump actions/checkout from 4 to 5 (<a
href="https://redirect.github.com/aws/s2n-quic/issues/2751">#2751</a>)</li>
<li><a
href="https://github.com/aws/s2n-quic/commit/30b021edc294601ec759ef5c2801c7f38c518860"><code>30b021e</code></a>
fix: clippy lint updates for rust version 1.89.0 (<a
href="https://redirect.github.com/aws/s2n-quic/issues/2750">#2750</a>)</li>
<li>See full diff in <a
href="https://github.com/aws/s2n-quic/compare/c64faf9c13ce423ff42145234da9a6e1fcad5955...ff81604a78b897b6ae01f53e210a4c88ff1193cf">compare
view</a></li>
</ul>
</details>
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Author: dependabot[bot]