Add method to get all roles of a `Parse.User`

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

Currently, to get what Roles a user has been assigned, you would need have your own method either to run a query to get Roles the current user has.

Feature / Enhancement Description

I'm hoping that we have a getUserRoles method on the Parse.User object where we can just call the currentUser object and receive an array of Role objects the user has been assigned.

Example Use Case

let currentUserRoles = currentUser.getUserRoles()

Alternatives / Workarounds

Currently, we have to make our own method to run the query like so

Parse.Cloud.define("getUserRoles", async (request) => {
	const { user } = request
	
	return await new Parse.Query(Parse.Role).equalTo("users", user).find({useMasterKey:true})
}, {
    requireAnyUserRoles: ["admin"]
})

3rd Party References

none that I can think of.

Review the Parse.User, Parse.Role, Parse.Query, and Parse.Cloud entry points named in the issue to determine where a user-to-role lookup belongs and how the public method should expose it. Define the expected behavior for the current user and confirm that the completed method returns the assigned Role objects without requiring a custom Cloud function.