[services] [web] [2/n] Web code gen changes for KeyserverKeysResponse Identity proto changes

Summary:
This introduces the necessary changes to our protobuf code gen from D10586

Depends on D10586

Test Plan: Verified by calling getKeyserverKeys through identity client on web. Received response with identity information

Reviewers: varun, ashoat

Reviewed By: varun

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10615