Rendering weirdness with projection shaders

Nobody has claimed this yet.

## Description of bug / unexpected behavior
I ran the following scene:

```py
from manim import *

class Test(Scene):
def construct(self):
a = Circle().scale(2)
self.add(a)
self.interactive_embed()
```

with the following command: `manim -pqm stroke_shaders.py --renderer=opengl --use_projection_stroke_shaders --use_projection_fill_shaders`. This is a recording of me zooming and moving the camera around in interactive mode:

https://user-images.githubusercontent.com/9102529/136681426-de6a25b4-9ef8-4b75-bdb9-29070268a56b.mp4

## Expected behavior

## How to reproduce the issue

Code for reproducing the problem

```py
Paste your code here.
```

## Additional media files

Images/GIFs

## 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

Reproduce the scene with `manim -pqm stroke_shaders.py --renderer=opengl --use_projection_stroke_shaders --use_projection_fill_shaders`, then inspect the OpenGL projection stroke and fill shader paths involved during `interactive_embed()`. Use the linked recording as the observed failure and consider the issue done when camera zooming and movement no longer produce the reported rendering artifacts.

Written by the indexing model from the issue text.