Update project REST API endpoint (PUT /rest/api/3/project/{projectIdOrKey}) does not work in free instances

Issue Summary

The Update project REST API endpoint (PUT /rest/api/3/project/{projectIdOrKey}) fails in FREE instances returning status 400 (bad request) and below error message:

"Changing permission schemes is not allowed on the Jira Software or Core Free plans."

This is because  Project permissions, roles, and issue-level security aren't configurable when you're on the Free plan. For details see:

•  Project permissions, roles, and issue-level security in Free plans 

Steps to Reproduce

1. Send a REST API request to update a project description text against a standard (non-free) Cloud site and see that it works as expected: 

   curl -u <EMAIL-ADDRESS>:<API-TOKEN> -H 'Accept: application/json' -H 'Content-Type: application/json' --data '{"description": "TEST DESCRIPTION"}' -X PUT "https://STANDARD.atlassian.net/rest/api/3/project/TSP"
   
   {"expand":"description,lead,issueTypes,url,projectKeys,permissions,insight","self":"https://STANDARD.atlassian.net/rest/api/3/project/10000","id":"10000","key":"TSP","description":"TEST DESCRIPTION",......
   

1. Now try to use the same REST API endpoint to update the description of a project on a FREE Cloud site

Expected Results

It works the same way it worked for the standard site and the project description is successfully updated

Actual Results

The request fails returning:

{"errorMessages": ["Changing permission schemes is not allowed on the Jira Software or Core Free plans."], "errors": {}}