Strange artifacts when rendering SVGs with opengl

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## Description of bug / unexpected behavior

When renderering some svgs the opengl renderer sometimes renders random lines, or missing pieces from the svg. This issue doesn't exist in cairo

## Expected behavior

Expected svg to render similar to cairos without missing pieces or added artifacts. Just mentioning #1762 and #1890 here as just looking at it visually I wonder if they could be related. See media screenshots

## How to reproduce the issue

Render `half_ellipse.svg` or `arcs01.svg` with code below to see issue.

Code for reproducing the problem

```py
class SvgTest(Scene):
def construct(self):
a = SVGMobject("../tests/test_graphical_units/img_svg_resources/half_ellipse.svg")
self.add(a)
self.interactive_embed()
```
```py
class SvgTest(Scene):
def construct(self):
a = SVGMobject("../tests/test_graphical_units/img_svg_resources/arcs01.svg")
self.add(a)
self.interactive_embed()
```

## Additional media files

Images/GIFs

OPENGL arc:

Cairo arc:

Opengl half ellipse:

Cairo half ellipse:

## Logs
Terminal output

```
PASTE HERE OR PROVIDE LINK TO https://pastebin.com/ OR SIMILAR
```

## System specifications

System Details

- OS (with version, e.g Windows 10 v2004 or macOS 10.15 (Catalina)):
- RAM:
- Python version (`python/py/python3 --version`):
- Installed modules (provide output from `pip list`):
```
PASTE HERE
```

LaTeX details

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

FFMPEG

Output of `ffmpeg -version`:

```
PASTE HERE
```

## Additional comments

Start by running the provided SvgTest examples with tests/test_graphical_units/img_svg_resources/half_ellipse.svg and arcs01.svg, comparing the OpenGL output with Cairo. Trace the SVGMobject rendering path and verify that both SVGs render without missing pieces or random lines in OpenGL, matching the Cairo results.

Written by the indexing model from the issue text.