test(NODE-7185): migrate integration/server-selection/readpreference test

[tadjik1]

Description

Summary of Changes

This PR migrates the integration tests for server-selection/readpreference. The changes include:

• Commenting out or skipping ineffective tests (follow-up NODE-7219 has been created)
• Import directly from the src folder, convert .js file test into .ts
• Refactor callback into async/await

Notes for Reviewers

Please note that 6 first tests are ineffective now:

• first 3 because of missing command method on the Topology class
• next 3 because the same types we check with Typescript

I do not want to make a decision on them in this PR, and instead follow-up ticket NODE-7219 has been created.

The Hedged Reads are deprecated in MongoDB Server version 8.0, so it probably makes sense to limit tests with requires: [mongodb<8.0] (also listed in the ticket).

What is the motivation for this change?

This work is part of a larger, ongoing initiative to convert all tests to use async/await, with the ultimate goal of removing the legacy driver wrapper.

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

[baileympearson]

Just one small comment. Otherwise LGTM