Make it possible to send form params in the URL, instead of the request body

[alexpetros]

Make it possible to use query parameters in DELETE requests via two mechanisms:

• Expose this as an option in the htmx:configRequest event
• Introduce a global config

This config should be generic i.e. it will allow you to do so in any request type (including GET) if so desired.

Follow-up issue from #1514