HTTP JSONPath Data Adapter: Allow testing data adapter from the creation/edit page

## What?

Allow testing the configuration for the HTTP JSONPath Data Adapter.

For example, a test/simulation UX elements can be added similar to the testing a pipeline rule. It could have an input box to specify a value that will be used in the lookup and return the result of the lookup.

## Why?

HTTP JSONPath Data Adapter is difficult to work with and requires a lot of trial and error to get the configuration correct, especially the values for 'Single value JSONPath' and 'Multi value JSONPath'. Not being able to test this while editing requires saving changes, testing, editing, testing, etc until you have it configured correctly.

## Context

While doing document review for our new public documentation pages for each data adapter I was reminded of the sharp edges related to configuring this data adapter and hope to help others avoid frustration in the future.