feat: add Opcode::modifies_memory back #3413

Job	Run time
check std	29s
check serde	25s
check no-default-features	17s
test no_std	27s
clippy	1m 24s
test stable --no-default-features	58s
test stable	1m 7s
docs	1m 16s
fmt	14s
test stable --all-features	1m 29s
test beta --no-default-features	1m 4s
test beta	56s
test beta --all-features	1m 41s
test nightly --no-default-features	2m 21s
test nightly	2m 21s
test nightly --all-features	2m 34s
	19m 3s

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