Adjust 'max_input_var' value

Acquia allows increasing `max_input_vars` up to 2,500 via the UI and 5,000 if you open a ticket.

Launching a new site with the acquia recipe, the value is set to 10,000.

Can this be lowered? I believe the default value Acquia has is 1,000.

Start by locating the Acquia recipe configuration that sets max_input_vars and compare its value with the limits and default described in the issue. Done means a newly launched Acquia site uses the intended lower value; verify the resulting configuration during a recipe launch.

Written by the indexing model from the issue text.