Sudo Autocomplete

[damianhxy]

Add autocomplete to Sudo page.

Also make sudo utilize user id instead of email, to facilitate reuse of autocomplete code between extension, submission, and sudo.

Description

• Add autocomplete logic to frontend
• Add autocomplete logic to backend
• Use cud id instead of email

Motivation and Context

As mentioned by Prof Iliano, it would be good to have autocomplete on the sudo page to easily select the correct user.

How Has This Been Tested?

(Same users from #1532)

• Successfully sudoed and unsudoed each user, with no autocomplete display issues

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have run rubocop for style check. If you haven't, run overcommit --install && overcommit --sign to use pre-commit hook for linting
• My change requires a change to the documentation, which is located at Autolab Docs
• I have updated the documentation accordingly, included in this PR

[victorhuangwq]

LGTM. Tested sudo autocomplete and it works as expected :)