test(NODE-7169): Migrate node-mongodb-native/test/unit tests

[PavelSafronov]

Description

Summary of Changes

Migrating node-mongodb-native/test/unit driver callback API style tests to promises.

What is the motivation for this change?

https://jira.mongodb.org/browse/NODE-4979

We want to modify all tests to no longer use callbacks as the driver is a promise only API now. This is a requirement for deprecating the legacy driver.

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]

CI is red, including a number of failures that are not present on main.

[PavelSafronov]

CI is red, including a number of failures that are not present on main.

Strange, looks like test/integration/client-side-encryption/client_side_encryption.prose.21.automatic_data_encryption_keys.test.ts is encountering errors, though this PR only changes test/unit. Looking into this.