Clarify/write docs for assigning a group as Project Leader (permissions)

Summary

A one line description of the request. Skip this if the title is already a good summary.

Request Type

If you know, say which of these types your request is in the title, and follow the suggestions for that type when writing your description.

Type 1: support a REST API:
If it is functionality that already exists in the REST API, example API calls are the clearest way to explain your request.

Type 2: add a REST API and support it in tsc.
If it is functionality that can be achieved somehow on Tableau Server but not through the REST API, describe the current way to do it. (e.g: functionality that is available in the Web UI, or by using the Hyper API). For UI, screenshots can be helpful.
Currently, "Project Leaders" can be assigned through the Web UI but do not see anything in the API or TSC where this could be assigned through there. Attached is a screenshot of how it is currently done.

Type 3: new functionality
Requests for totally new functionality will generally be passed to the relevant dev team, but we probably can't give any useful estimate of how or when it might be implemented. If it is a feature that is 'about' the API or programmable access, here might be the best place to suggest it, but generally feature requests will be more visible in the Tableau Community Ideas forum and should go there instead.

Description

A clear and concise description of what the feature request is. If you think that the value of this feature might not be obvious, include information like how often it is needed, amount of work saved, etc. If your feature request is related to a file or server in a specific state, describe the starting state when the feature can be used, and the end state after using it. If it involves modifying files, an example file may be helpful.
This feature would have it so that this process can be automated through our pipeline and would save the time of having to go in and set it manually.