Bug/7917 background image webgl fix

[ban-abhijit]

Fixes #7917
Also checks for some other image like things, e.g. p5.Graphics or p5.MediaElement (for a webcam capture) or p5.Texture or p5.Framebuffer
I'm a first timer and happy to hear feedbacks

[perminder-17]

Hi @ban-abhijit, thanks a lot for working on this. I noticed there are quite a few formatting changes that aren’t really needed for this PR. For next time, it would be great if you could double-check your changes and remove anything unnecessary before submitting.

Also, since this issue was already assigned to someone else and you’ve opened a PR, I’ll need to close this one as a duplicate of #7963. Thanks for your effort and understanding!

[ban-abhijit]

Hi @perminder-17 thanks for making me realize my rookie mistakes. I just wanted to know I made a change in a function of single file, ran the lint fix command and then had submitted the pr. How did the formatting of the whole file got messed up? and how can I check and fix it from the next time? Also, sorry for the inconvenience.