refactor: use TestAuthorization and skip decoding of eip7702 tx #4266

Job	Run time
check	19s
check serde	28s
check no_std	34s
check std	18s
check no_std kzg-rs	26s
clippy	1m 23s
docs	1m 38s
fmt	7s
test stable --no-default-features	1m 6s
TyposCheck	6s
test stable	53s
test stable --all-features	1m 19s
test beta --no-default-features	58s
test beta	54s
test beta --all-features	1m 23s
test nightly --no-default-features	46s
test nightly	45s
test nightly --all-features	1m 6s
	14m 29s

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