Auto merge of #2776 - rust-lang:dependabot/cargo/test_dependencies/tokio-1.24.2, r=RalfJung

Bump tokio from 1.23.1 to 1.24.2 in /test_dependencies

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.23.1 to 1.24.2.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/tokio-rs/tokio/releases">tokio's releases</a>.</em></p>
<blockquote>
<h2>Tokio v1.24.1</h2>
<p>This release fixes a compilation failure on targets without <code>AtomicU64</code> when using rustc older than 1.63. (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5356">#5356</a>)</p>
<p><a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5356">#5356</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5356">tokio-rs/tokio#5356</a></p>
<h2>Tokio v1.24.0</h2>
<p>The highlight of this release is the reduction of lock contention for all I/O operations (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5300">#5300</a>). We have received reports of up to a 20% improvement in CPU utilization and increased throughput for real-world I/O heavy applications.</p>
<h3>Fixed</h3>
<ul>
<li>rt: improve native <code>AtomicU64</code> support detection (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5284">#5284</a>)</li>
</ul>
<h3>Added</h3>
<ul>
<li>rt: add configuration option for max number of I/O events polled from the OS
per tick (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5186">#5186</a>)</li>
<li>rt: add an environment variable for configuring the default number of worker
threads per runtime instance (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/4250">#4250</a>)</li>
</ul>
<h3>Changed</h3>
<ul>
<li>sync: reduce MPSC channel stack usage (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5294">#5294</a>)</li>
<li>io: reduce lock contention in I/O operations  (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5300">#5300</a>)</li>
<li>fs: speed up <code>read_dir()</code> by chunking operations (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5309">#5309</a>)</li>
<li>rt: use internal <code>ThreadId</code> implementation (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5329">#5329</a>)</li>
<li>test: don't auto-advance time when a <code>spawn_blocking</code> task is running (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5115">#5115</a>)</li>
</ul>
<p><a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5186">#5186</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5186">tokio-rs/tokio#5186</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5294">#5294</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5294">tokio-rs/tokio#5294</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5284">#5284</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5284">tokio-rs/tokio#5284</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/4250">#4250</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/4250">tokio-rs/tokio#4250</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5300">#5300</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5300">tokio-rs/tokio#5300</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5329">#5329</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5329">tokio-rs/tokio#5329</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5115">#5115</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5115">tokio-rs/tokio#5115</a>
<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/5309">#5309</a>: <a href="https://github-redirect.dependabot.com/tokio-rs/tokio/pull/5309">tokio-rs/tokio#5309</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/tokio-rs/tokio/commits">compare view</a></li>
</ul>
</details>
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