feat(NODE-4751)!: drop support for client encryption < 2.3.0

[baileympearson]

Description

What is changing?

mongodb-client-encryption is now an optional peer dependency with a support version range of ^2.3.0.

Is there new documentation needed for these changes?

Yes, we need to document our support matrix.

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

[durran]

We do have some lint errors: https://spruce.mongodb.com/task/mongo_node_driver_next_lint_run_lint_checks_patch_14427d1b07518cbb3ca36dfbd24f02cd2e486835_63c06e15850e614bec665459_23_01_12_20_31_18/logs?execution=0

[durran]

2 more lint failures: https://spruce.mongodb.com/task/mongo_node_driver_next_lint_run_lint_checks_patch_14427d1b07518cbb3ca36dfbd24f02cd2e486835_63c16f490305b974e2f8a052_23_01_13_14_48_42/logs?execution=0