feat(NODE-5506): add Binary subtype sensitive

[aditi-khare-mongoDB]

Description

New BSON.Binary subtype 0x08 sensitive is introduced.

What is changing?

See release highlights.

Is there new documentation needed for these changes?

No, internal changes only.

What is the motivation for this change?

• Required by downstream teams (shell).
• Sensitive = excluded from logging, creating more security for sensitive values like HMAC keys.

Release Highlight

Add SUBTYPE_SENSITIVE on Binary class

When a BSON.Binary object is of 'sensitive' subtype, the object's subtype will equal 0x08.

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
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• Changes are covered by tests
• New TODOs have a related JIRA ticket

[nbbeeken]

Pretty much lgtm, just a few more bits: Can we also add to the static constants we have on the Binary class? and tests that match what we did with the last new constant?

#461

Also "See release highlights." but there are none, this is a feat so it should have something, I'd say nothing more than the new constant on the Binary class and what it refers to.