docs: add info about testing with different versions and the rosetta setup for Mac

[PavelSafronov]

Description

Summary of Changes

Test readme updated with info about testing with different versions, plus command to install rosetta.

What is the motivation for this change?

Explain how to test different versions.

Double check the following

• Self-review completed using the steps outlined here
• PR title follows the correct format: type(NODE-xxxx)[!]: description

[baileympearson]

Do you feel that this documentation makes more sense to put in https://github.com/mongodb-labs/drivers-evergreen-tools?

[PavelSafronov]

Do you feel that this documentation makes more sense to put in https://github.com/mongodb-labs/drivers-evergreen-tools?

In the node-mongodb-native repo, we talk about run-orchestration.sh just in this readme file, so I think these comments are relevant here. It's where developers will go to figure out how to run tests, so it makes sense to talk about how to run different flavors of tests.

drivers-evergreen-tools has the information about version, so I can add the note about Rosetta there. Should that be a separate PR?

[baileympearson]

In the node-mongodb-native repo, we talk about run-orchestration.sh just in this readme file, so I think these comments are relevant here. It's where developers will go to figure out how to run tests, so it makes sense to talk about how to run different flavors of tests.

drivers-evergreen-tools has the information about version, so I can add the note about Rosetta there. Should that be a separate PR?

That seems like an oversight. .evergreen/run-orchestration.sh is just a wrapper around https://github.com/mongodb-labs/drivers-evergreen-tools/blob/master/.evergreen/run-orchestration.sh - it seems like we should just link to drivers-evergreen-tools' run-orchestration script instead of including any documentation ourselves.

Maybe we could update https://github.com/mongodb-labs/drivers-evergreen-tools/blob/master/.evergreen/run-orchestration.sh to document the ARCH flag, and update our documentation to just point to https://github.com/mongodb-labs/drivers-evergreen-tools/blob/master/.evergreen/run-orchestration.sh?