Bumps [deps/googletest](https://github.com/google/googletest) from
`2ae29b5` to `52204f7`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="52204f78f9"><code>52204f7</code></a>
Remove obsolete references to LinuxThreads.</li>
<li>See full diff in <a
href="2ae29b52fd...52204f78f9">compare
view</a></li>
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