feat(NODE-5838): remove support for server 3.6

[durran]

Description

Removes support for MongoDB 3.6

What is changing?

• Syncs SDAM spec tests and updates the incorrect ones where maxWireVersion was set to 6.
• Updates the incorrect max staleness spec tests with the same issue.
• Removes MONGODB-CR auth.
• Removes 3.6 server from the Evergreen CI matrix.

Is there new documentation needed for these changes?

Need to communicate one minor release prior.

What is the motivation for this change?

NODE-5838

Release Highlight

MongoDB 3.6 is no longer supported

Server versions 3.6 and lower will get a compatibility error on connection and support for MONGODB-CR authentication is now also removed.

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
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• [ ] Changes are covered by tests
• [ ] New TODOs have a related JIRA ticket