IPC Message clean up #5722

Job	Run time
bench test	1m 57s
Check generated proto/fbs files are up to date	50s
Rust build (all-features)	1m 57s
License Check and Audit Check	1m 36s
Rust build (default features)	1m 57s
miri	1m 55s
Python (lint)	1m 56s
Rust build (with tokio dispatcher)	1m 57s
Rust build (with compio dispatcher)	1m 58s
Python (test)	1m 56s
Rust build (with tokio+compio dispatcher)	1m 57s
Rust (docs)	1m 17s
Rust (tests)	1m 46s
Rust build (wasm32 with default features)	1m 56s
	24m 55s

Provide feedback