Generate code for all google.protobuf types

[romac]

@tony-iqlusion:

Sidebar: in cosmos-sdk-proto and ibc-proto we've discussed ditching prost-types and generating the google.protobuf protos directly from the protobuf schema using the same conventions as everything else, which among other things allows integrations with pbjson for building JSON serializers /cc @romac

See discussion here: cosmos/cosmos-rust#459 (review)

@romac:

We should probably generate code for all google.protobuf types (ie. including Any) instead of copy-pasting a subset of it, and then use those directly from ibc-proto-rs instead of the latter having its own copy of them.

Otherwise one cannot pass a tendermint_proto Duration where an ibc-proto Duration is expected and vice-versa, same for the other well-known types.

Originally posted by @romac in #1444 (comment)