Background & Motivation
The Client Side Encryption specification User Facing API describes the driver API.

Scope
Update the API of the CSFLE specification:

• Add API to the CSFLE specification to support search paths.
• Add a "csfle search paths" section to the CSFLE specification describing search path behavior.

Add tests to the CSFLE specification for drivers:

• Add tests with csfle library to CSFLE specification tests.
• Add a script to download the csfle library to drivers-evergreen-tools.