EIP-7702: change `chain_id` type to `U256` #5553

Job	Run time
wasm-unknown	54s
doctest	1m 10s
test ubuntu-latest stable --no-default-features	1m 32s
clippy	42s
docs	57s
feature-checks	3m 42s
fmt	15s
wasm-wasi	1m 29s
test ubuntu-latest stable	1m 24s
test ubuntu-latest stable --all-features	2m 13s
test ubuntu-latest nightly --no-default-features	1m 14s
check no_std	22s
test ubuntu-latest nightly	1m 24s
test ubuntu-latest nightly --all-features	2m 15s
test ubuntu-latest 1.81 --no-default-features	46s
test ubuntu-latest 1.81	50s
test windows-latest stable --no-default-features	4m 26s
test windows-latest stable	3m 20s
test windows-latest stable --all-features	6m 21s
test windows-latest nightly --no-default-features	4m 17s
test windows-latest nightly	3m 57s
test windows-latest nightly --all-features	5m 23s
test windows-latest 1.81 --no-default-features	2m 31s
test windows-latest 1.81	3m 28s
deny / cargo deny check	24s
ci success	1s
	55m 17s

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