Finalize eslint ruleset for repo

[tylerbutler]

We want to have a standard eslint ruleset across the repo. Currently we have a set but it's overwritten in many places, and it is not nearly as strict as it should be to prevent new projects from introducing known-bad patterns. This leads to inconsistent and hard to maintain code.

Issues

Done

• Feedback: ESLint ruleset #9502
• ESLint config: Print config and add tsdoc plugin #9740
• Consider adopting '@rushstack/eslint-config' as a starting point for ESLint config #3921
• Reenable eslint rule @typescript-eslint/unbound-method #9082
• eslint config: Fix modern module resolution #9562
• Configure node-module prevention rules differently for test files -- consider permitting some of them

Next

• Possible lint/uniformity issue with trailing commas. #6070
• no-null/no-null should be disabled in eslint config #8831

[tylerbutler]

Removing the epic label since this is sub-issue for tracking the eslint ruleset itself. The epic #9501 tracks the overall work to define the new config and apply it across the repo.

[tylerbutler]

Closing. The work this was tracking, to develop our list of rules, was done. #9501 tracks all the remaining work as the main tracking epic.