Add template support for workflow steps with non-text input params

[scott-taubman]

When configuring a workflow step, parameters that have non-text input fields have no way of leveraging the template input. That is, if I want to use a workflow parameter as the input to a step parameter that is a boolean, date, or file for example, I can't do that because the input fields for those types does not allow free-form text.

We should have a button clickable text near each field of that type to "enable templating", which would transform the input field for those parameters into a a regular text input field rather than their default types (checkbox, datepicker, etc).