Replace use of query-string dependency for URLSearchParams

[jsnwesson]

Upgrading to query-string v8+ has been a pain point for codebases, and Learner Dashboard is no exception.

What I've discovered is that our use for query-string in Learner Dashboard can be fulfilled with URLSearchParams, which occurs in two files (hook.js and src/data/services/lms/utils.js), and so instead of trying to fix the failed tests for upgrading query-string to v9, I suggest replacing it completely.

This will require updating the tests for both files and removing the query-string dependency from package.json.