fix(NODE-3792): remove offensive language throughout the codebase

[ljhaywar]

Description

Remove references to "master" throughout the codebase

What is changing?

• Any references to master that can be updated are updated or abstracted to a constant
• Any references to master that cannot be updated are deprecated
• Exceptions:
  • CSFLE references to masterKey are out of scope
  • Historical documentation (e.g. history.md and changes_x.md) can remain as-is
  • References to GitHub repos with master branches
  • Spec tests are covered in NODE-3791

Is there new documentation needed for these changes?

No

What is the motivation for this change?

Following the guidance documented in tools.ietf.org/id/draft-knodel-terminology-00.html, we will remove all oppressive and unnecessarily gendered language in driver documentation, code, tests, specs, and spec tests.

Double check the following

• Ran npm run check:lint script
• Self-review completed using the steps outlined here
• PR title follows the correct format: <type>(NODE-xxxx)<!>: <description>
• Changes are covered by tests
• New TODOs have a related JIRA ticket

[ljhaywar]

This is ready for review. The build failures are all the Task Timeouts we've discussed. It would be good to get a second set of eyes to ensure I didn't change anything that should be deprecated instead.

[dariakp]

The code all LGTM, really great job here @ljhaywar ! Just waiting on the tests to get sorted out :)

[ljhaywar]

I reran the local patch from my machine with delete response[LEGACY_HELLO_COMMAND]; in the two places Neal suggested, and this time the build passed:
https://spruce.mongodb.com/version/61dec74b2a60ed5bf60f7889/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC

Maybe it was the mistake I made that Neal caught? Or maybe it was unrelated as I've been seeing the Context Cancelled errors sporadically in my builds and others'? Either way, I think we're good to go.