Allow passing AR records to jsonapi_* http operations

[jasonkarns]

Rationale: the jsonapi_* helpers for GET/POST/PUT/PATCH/DELETE each accept a url. In many api specs, the url can be derived from the ActiveRecord record(s) that are created before-hand. This allows the specs to pass the AR records to the jsonapi_* helpers directly and have the URL derived from the model the same way that Rails derives its routing for a given AR model instance.

that allows make_request subjects like:
jsonapi_get order, jsonapi_put user, jsonapi_delete card and for index: jsonapi_get products_path

Initial slack discussion: https://graphiti-api.slack.com/archives/C5A4UEMGS/p1658959255745979

The url_for helper still accepts a regular string, so it should be backwards compatible with existing usage.