* [rpc server]: extract rpc_module to utils.

This commit extracts the `rpc_module` from the servers to be shared.
It will help to re-use rpc modules within both the servers

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/mod.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* address grumbles

* fix build

* fix docs

* cargo fmt

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* grumbles: use MethodSink

* Update utils/src/server/mod.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

* Update utils/src/server/rpc_module.rs

Co-authored-by: David <[email protected]>

Co-authored-by: David <[email protected]>