Add support for exclusive parameter groups (e.g. exactly_one_of)

grape 2.0.0

Having an issue when using nested params with exactly_one_of, here is my current setup

params :required_date do
  optional :date
  use :date_range
  exactly_one_of :date, :date_range
end

params :date_range do
  requires :start_date
  requires :end_date
  valid_interval :start_date, :end_date
end

On my endpoint I'm using the required_date param

when I run the following:
/example_endpoint?start_date=2024-03-11&end_date=2024-03-12
It returns:
{"error":"parameter validation failed","parameters":["date","date_range"],"values":[null,null],"reason":"are missing, exactly one parameter must be provided: date, date_range"}

Any way that grape will check the nested params(start_date and end_date) instead of looking for date_range?

Thanks!

Reproduce the issue at the example endpoint using the required_date and date_range parameter definitions shown in the report. Start by tracing validation for exactly_one_of with nested params; done means start_date and end_date satisfy the date_range alternative instead of being reported as missing, while the exclusivity rule still works.