• Support configuring autoEncryption option on a connection
• Don't support keyVaultClient for the time being, as it greatly complicates things

Notes:

• Connections created by the bundle may be shared between document managers
• Solution: have a separate connection service (read, client instance) for each document manager and inject the schema map
• Internally, PHPC will reuse existing libmongoc connections if the options and driverOptions parameters match, so there should be no impact when two document managers share a client with either no or the same encryption config