Backport NODE-5296 to v4.x.

Parent Ticket Description:

Use Case

As a driver user and engineer
I want to be able to read a helpful error message at the top level error
So that I do not have to programmatically access the error structure

User Impact

• Starting in Node.js 20 ECONNREFUSED errors are returns as AggregateErrors which have an empty message string. Our current error handling logic will then also have an empty error message.

Unknowns

• How should we build a message from an AggregateError?
  • Answer: Join error messages together

Acceptance Criteria

Implementation Requirements

• Join error messages in MongoError super class

Testing Requirements

• Unit test passing AggregateError to MongoError and asserting an appropriate message is set
• revert satisfies assertion in client_side_encryption.prose.test.js, bypass mongocryptd tests, the error message should be matched on instead

Documentation Requirements

• None

Follow Up Requirements

• Double check mongoclient encryption and file a ticket if needed