[V3] make generic upload parameters for io.Combo.Input

[bigcat88]

1. Removed unnecessary content_types field (not used in V1 nodes)
2. Switched to using the UploadType enum to specify the uploaded file type for COMBO inputs

Change number 2 is required to port audio and video nodes to the V3

[christian-byrne]

This LGTM, nice catch. On the frontend, we are also supporting animated_image_upload for apng and animated webp uploads.

Also, we have allow_batch to specify that the upload allows multiple files at once, which will be sent as a comma-separated list of filepaths.

See all the combo input options the frontend reads: https://github.com/Comfy-Org/ComfyUI_frontend/blob/main/src/schemas/nodeDefSchema.ts#L74-L85

[Kosinkadink]

looks good, merging