fix(eip7702): Add tests and fix some bugs #3879

Job	Run time
clippy	1m 22s
check	19s
check no_std	20s
check serde	30s
docs	1m 13s
check std	20s
fmt	5s
test stable --no-default-features	2m 8s
test stable	2m 18s
test stable --all-features	2m 34s
test beta --no-default-features	2m 17s
test beta	2m 8s
check no_std optimism	20s
test beta --all-features	2m 34s
test nightly --no-default-features	2m 1s
test nightly	2m 8s
test nightly --all-features	2m 22s
	24m 59s

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