fix(NODE-2899): sort and correct circular imports

[nbbeeken]

Description

What is changing?

• A number of constants are moved to a shared leaf module.
• moved commandSupportsReadConcern to utils.ts for sharing
• Auth providers map can be defined inside the only module that uses it
• changed the defaultAuthProviders file name, it was the only camelcase one
• sorted all the imports and added that to our linting
• added testing to make sure each file can be imported on its own

What is the motivation for this change?

Imports are sorted, and we are checking to be sure circular dependency issues aren't reintroduced.

Double check the following

• Ran npm run check:lint script
• Self-review completed using the steps outlined here
• PR title follows the correct format: <type>(NODE-xxxx)<!>: <description>
• Changes are covered by tests
• New TODOs have a related JIRA ticket

Flakey test discovered: https://jira.mongodb.org/browse/NODE-3808

[dariakp]

Note: Marking blocked on the merge of our two outstanding feature PRs

[dariakp]

Removing blocked label since the feature PR went in (and we shouldn't need to worry about this for the dot notation one); just needs a rebase before re-review and merge

[dariakp]

LGTM, tyvm