Bump test from 1.25.9 to 1.25.12 in /auto_submit (#4079)

Bumps [test](https://github.com/dart-lang/test/tree/master/pkgs) from 1.25.9 to 1.25.12.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/dart-lang/test/releases">test's releases</a>.</em></p>
<blockquote>
<h2>package:test v1.25.12</h2>
<ul>
<li>Fix hang when running multiple precompiled browser tests.</li>
</ul>
<h2>package:test v1.25.11</h2>
<ul>
<li>Update to be forward compatible with <code>package:shelf_web_socket</code> version <code>3.x</code>.</li>
</ul>
<h2>package:test v1.25.10</h2>
<ul>
<li>Update the <code>package:vm_service</code> constraint to allow version <code>15.x</code>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/dart-lang/test/commit/dc0f8ea4d09aabb0fed16daea3d4653c8f967b02"><code>dc0f8ea</code></a> Fix hang after multiple precompiled browser tests (<a href="https://github.com/dart-lang/test/tree/master/pkgs/issues/2422">#2422</a>)</li>
<li><a href="https://github.com/dart-lang/test/commit/20967732ea9dd30240a6429621ab2f82874bd9f0"><code>2096773</code></a> Update the use of 'package:shelf_web_socket's <code>webSocketHandler</code> method (<a href="https://github.com/dart-lang/test/tree/master/pkgs/issues/2421">#2421</a>)</li>
<li><a href="https://github.com/dart-lang/test/commit/1d28d738e2f4527de12aa6ef35c754b5c1ee95a5"><code>1d28d73</code></a> Support <code>package:vm_service</code> 15.x (<a href="https://github.com/dart-lang/test/tree/master/pkgs/issues/2420">#2420</a>)</li>
<li>See full diff in <a href="https://github.com/dart-lang/test/commits/test-v1.25.12/pkgs">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=test&package-manager=pub&previous-version=1.25.9&new-version=1.25.12)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

</details>

auto_submit/pubspec.yaml

@@ -37,7 +37,7 @@ dev_dependencies:
   json_serializable: 6.9.0
   flutter_lints: 5.0.0
   mockito: 5.4.4
-  test: 1.25.9
+  test: 1.25.12
 
 builders:
   json_serializable: 3.3.0