Include standard details payloads in "well-known" protobuf types known by grpcurl

The [standard details payloads](https://github.com/googleapis/googleapis/blob/master/google/rpc/error_details.proto) are commonly used for error details. This is prescribed by [AIP-193: Errors](https://google.aip.dev/193). These message types are not likely to be referenced from service definitions, and are therefore unlikely to be available from server reflection. Having these be "built-in" to grpcurl would allow them to be resolved when grpcurl receives an error status while still using server reflection.

Related to #152