[Feature] Make upload timeout configurable

[yuri-becker]

Is your feature request related to a problem? Please describe.
When uploading larger files to RomM, the upload is cancelled after exactly two minutes. When the instance is on a remote server, uploads of even DVD games can take far longer.

Describe the solution you'd like
Ideally, admins would be able to configure the timeout, or completely disabling it. Possibly via Environment Variables.

Describe alternatives you've considered
An alternative would be to just statically disable the timeout or set it to a high enough time.

Additional context
I originally commented this request on this commit: e20465f?diff=unified#diff-90fd36aad18db541451cbf233c961cb25c21a3f107ff47e0f8b89057c590797c
This also shows the relevant piece of code.

[yuri-becker]

I would also be willing to implement this myself if you're open to it.

[gantoine]

Yeah go for it! You'll want to add an env variable for it and import it in config/__init__.py (like we do for SCAN_TIMEOUT). just make sure the default stays the same 600 seconds/10 mins.

[gantoine]

Closing this as its merged, will be in the next release.