refactor: use TestAuthorization and skip decoding of eip7702 tx #4279

Job	Run time
check	22s
check serde	21s
check std	17s
check no_std	29s
clippy	1m 22s
check no_std kzg-rs	24s
docs	1m 20s
fmt	6s
test stable --no-default-features	2m 23s
test stable	2m 28s
TyposCheck	7s
test stable --all-features	2m 29s
test beta --no-default-features	2m 24s
test beta	2m 17s
test beta --all-features	2m 23s
test nightly --no-default-features	2m 11s
test nightly	2m 3s
test nightly --all-features	2m 17s
	25m 43s

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