PATCH option for resource azapi_update_resource

I know after dumpster diving in closed issues that azapi_resource_action is available.

However it seems documented pretty obscurely when you also have `azapi_update_resource` available. The example doesn't represent the same features that you would use update_resource for.

The name of the resource is important since when you first arrive you see update and think thats what I want. Then spend an a few hours battling why it doesn't work and tries to change everything. resource_action doesn't really sign "I change things" when you first read it.

That is how I interpreted whats going on in docs.

Is it possible that `azapi_update_resource` could just have a `http_method` option that is defaulted to "PUT" but at least allows the user to change it to match what the documentation requires.

Start by locating the azapi_update_resource implementation and its documentation example, then compare them with azapi_resource_action, which the issue identifies as the existing alternative. Check how the resource defines its HTTP behavior and document what done means: an optional http_method defaults to PUT and supports the PATCH operation described in the documentation.

Written by the indexing model from the issue text.