Add support for Client side field level encryption

[Crownpack07]

There is currently no support for Client Side Field Level Encryption (CLSFE) because the package is missing the mongodb-client-encryption package which is a dependency for CSFLE to work

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The solution to the problem is adding the package mentioned above which enables the CLSFE. I do not believe that there is anything else missing as the additional configuration can be passed using the existing config file by the consumer of the package.

CSFLE setup is based on this article