[Feature Request] Upscale node does not have all upscalers installed

[PereViader]

Motivation The upscale node does not display all upscalers available on the user system. The user may wish to use extra upscalers that have been manually installed and thus chaiNNer may not know about.

Description Ideally query Automatic1111 for the available upscalers and build the dropdown options dynamically.

Alternatives Provide the current default options and then allow the user to input an upscaler string so they can enter any other value not available by default.

Workaround As stated here https://github.com/chaiNNer-org/chaiNNer/pull/2998, Automatic1111's code can be updated. We can use one of the default upscaler names and then replace that name to some other the user actually wishes to use.