test(NODE-7076): remove data lake tests

[durran]

Description

Removes all ADL related testing.

Summary of Changes

• Removes Evergreen tasks and variants
• Removes scripts
• Removes configuration information

What is the motivation for this change?

NODE-7076

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]

Two changes:

1. Can we remove the reference to npm run check:adl from the test readme?
2. Can we remove the test/spec/atlas-data-lake directory?

[durran]

Two changes:

1. Can we remove the reference to `npm run check:adl` from the test readme?

2. Can we remove the `test/spec/atlas-data-lake` directory?

Done