🚀 Feature: Add getAccessKind

[JoshuaKGoldberg]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

I took a peek through the typescript-eslint yarn.lock to see who depends on tsutils still. eslint-plugin-deprecation does still for exactly one function: import { isReassignmentTarget } from 'tsutils';.

isReassignmentTarget is a one-liner in tsutils that calls to a much larger getAccessKind function.

Additional Info

This is essentially a split-off from #3, long after I'd thought #3 was resolved. 😄