Add direct upload

[ehasrouni]

Adds the ability to enable direct uploads, which can help circumvent upload limits on the server. This is helpful when attempting to upload larger CSV files without having to play with the max size of 20mb

re-attempts #1031

[ehasrouni]

input["data-direct-upload-url"] is returning nil for Rails <=7.0

More specifically, it is failing here from the looks of it: https://github.com/rails/rails/blob/c11312a918555aaad99b334d374a791cd6268152/actionview/lib/action_view/helpers/form_tag_helper.rb#L1078 and is setting "data-direct-upload-url" to null

[etiennebarrie]

There was a previous attempt at this: #1031
The main issue you're going to get is the lack of asset pipeline here: #1029

We should definitely support direct uploads, but I'd like to do it without requiring the asset pipeline. I think we might be able to rely on config.assets being present, and support both propshaft and sprockets. In the worst case we could support only propshaft. We could just use direct uploads when the asset pipeline is configured, but not otherwise. We probably don't need a configuration option for this.