Enable import/order in eslint config, with alphabetization turned on.
Import organization is one of those things that bizarrely takes up more time and thought than it should (none), so let's make it automatic.
Also removed a couple of off entries that don't currently trigger anything.
Test Plan: Lint, ts, jest.
Reviewers: alangenfeld, bengotow, prha, sashank
Reviewed By: prha
Differential Revision: https://dagster.phacility.com/D4445