refactor(NODE-7313): only use dns.resolve for all types

[durran]

Description

Refactors all dns resolution to only go through lookup and resolve.

Summary of Changes

• Refactors dns resolution to only use lookup and resolves
• Fixes all tests

What is the motivation for this change?

NODE-7313

Release Highlight

Release notes highlight

Double check the following

• Lint is passing (npm run check:lint)
• 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