[CommCoreModule] MessageSpec changes for updated UPDATE_RELATIONSHIP
Summary:
This is effectively https://github.com/CommE2E/comm/commit/3d47f80c594a69206179fd8f33bb57d31b1fd78d and https://github.com/CommE2E/comm/commit/f1debdb595bcba76db8e91ff8d70519b9b0a785b squashed together into a single diff.
We use the same spec for both on the C++ side.
Depends on D11382
Test Plan:
Close reading + builds
NOTE: It appears that we're missing a spec for TOGGLE_PIN. This doesn't appear to cause any issues on C++ side since message_specs_initializer is a Map rather than eg std::vector so it's fine that we have a "gap."
Reviewers: ashoat, ginsu, varun, will
Reviewed By: ashoat
Subscribers: tomek
Differential Revision: https://phab.comm.dev/D11383