Bump opencv-python from 4.11.0.86 to 4.12.0.88 in /tests (#31235)

Bumps [opencv-python](https://github.com/opencv/opencv-python) from
4.11.0.86 to 4.12.0.88.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/opencv/opencv-python/releases">opencv-python's
releases</a>.</em></p>
<blockquote>
<h2>4.12.0.88</h2>
<p>Complete OpenCV 4.12.0 changelog: <a
href="https://github.com/opencv/opencv/wiki/OpenCV-Change-Logs#version4120">https://github.com/opencv/opencv/wiki/OpenCV-Change-Logs#version4120</a></p>
<p>Python:</p>
<ul>
<li>Added libavif to the package and corresponding image format support
on Linux and Mac OS. Windows is in progress.</li>
<li>Enabled GIF support by default.</li>
<li>Updated Numpy dependency rules. Packages for Python 3.9+ are built
with Numpy 2.x. Packages for older Python version are built with Numpy
1.x.</li>
<li>Improved libjpeg-turbo performance in Windows builds (added NASM and
assembly branches).</li>
<li>Made DNN, FLANN, G-API modules optional during the package build
(bindings generation and typing).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a
href="https://github.com/opencv/opencv-python/commits">compare
view</a></li>
</ul>
</details>
<br />


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tests/e2e_tests/requirements.txt

@@ -7,7 +7,7 @@
 py-cpuinfo==9.0.0
 scipy>=1.5.4,<1.17
 opencv-python>=4.5; sys_platform != "darwin"
-opencv-python==4.11.0.86; sys_platform == "darwin"
+opencv-python==4.12.0.88; sys_platform == "darwin"
 unittest-xml-reporting==3.2.0
 lpips==0.1.4