feat: Add `maybe_async_trait` #1330

Job	Run time
Light checks	19s
Build for no-std (stable)	45s
Check all features and all targets against the MSRV, except for winter-prover and winterfell	1m 37s
Check prover and winterfell packages	1m 4s
Build for no-std (nightly)	39s
Test Rust stable on	1m 10s
Test Rust nightly on	1m 9s
	6m 43s

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