Image-mobject not rotating correctly around in-plane axis

Description of bug / unexpected behavior

When trying to rotate an Image() around an axis in the XY-plane the image is also rotated around the Z-axis and thus cannot be mirrored.

Expected behavior

When rotating a 2D-object 180° around an axis in the XY-plane it should end up mirrored on the scene.

How to reproduce the issue

A follow up from the discussion on Discord https://discord.com/channels/581738731934056449/1027662457130455081

Code for reproducing the problem

```py import requests import io from PIL import Image class TestScene(Scene): def construct(self): headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'} response = requests.get("https://raw.githubusercontent.com/ManimCommunity/manim/main/logo/cropped.png", headers=headers) image_bytes = io.BytesIO(response.content) image = Image.open(image_bytes) def reflect_across(self, line, **kwargs): A = line.get_start() B = line.get_end() AB = B - A P = self.get_center() AP = P - A BP = P - B perp_to_AB = AP - AB*(np.dot(AP, AB))/(np.linalg.norm(AB)**2) self.flip(AB).shift(-2*perp_to_AB) return self # This binds the defined function reflect_across to the mobject class as if it were a native manim mobject method # This isn't necessary but it does allow the function to be used like any established mobject method, such as rotate, shift, etc. setattr(Mobject, "reflect_across", reflect_across) flipflop = ImageMobject(image) rect = SurroundingRectangle(flipflop) line = Line(3*DL, 2*UP + 2*LEFT) self.add(flipflop, rect, line) self.wait() self.play(flipflop.animate.reflect_across(line), rect.animate.reflect_across(line), run_time = 3) self.wait() self.play(flipflop.animate.reflect_across(line), rect.animate.reflect_across(line), run_time = 3) self.wait() self.play(flipflop.animate.reflect_across(line), rect.animate.reflect_across(line), run_time = 3) ```

Additional media files

Images/GIFs

see here: https://discord.com/channels/581738731934056449/1027662457130455081/1028225119857950720

System specifications

System Details

- OS Windows 10 - RAM: enough - Python 3.9.8 - Manim Community v0.16.0.post0

LaTeX details

+ LaTeX distribution (e.g. TeX Live 2020): + Installed LaTeX packages:

FFMPEG

Output of `ffmpeg -version`: ``` ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9.3.1 (GCC) 20200523 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc 55. 5.100 / 55. 5.100 ```

ManimCommunity / manim