chore: all scalars support cast #6713

Job	Run time
Python (lint)	3m 51s
Python (test)	6m 22s
Rust (docs)	2m 2s
bench test	16m 40s
Rust build (all-features)	9m 45s
Rust build (default features)	8m 4s
Check generated proto/fbs files are up to date	34s
Rust build (with tokio dispatcher)	7m 35s
License Check and Audit Check	5m 59s
Rust build (with compio dispatcher)	7m 38s
miri	8m 8s
Rust build (with tokio+compio dispatcher)	7m 52s
Rust (lint)	2m 31s
Rust build (wasm32 with default features)	2m 48s
Rust (tests)	7m 39s
	1h 37m 28s

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