refactor: use TestAuthorization and skip decoding of eip7702 tx #4267

Job	Run time
check no_std	22s
check	29s
check no_std kzg-rs	53s
check serde	23s
clippy	1m 34s
check std	29s
docs	1m 17s
fmt	14s
test stable --no-default-features	1m 13s
test stable	1m 1s
TyposCheck	6s
test stable --all-features	1m 32s
test beta --no-default-features	58s
test beta	1m 3s
test beta --all-features	1m 30s
test nightly --no-default-features	59s
test nightly	49s
test nightly --all-features	1m 17s
	16m 9s

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