[pallet-revive] use evm decimals in call host fn #13991

Job	Run time
preflight / preflight	37s
preflight / ci-versions	1m 8s
test-linux-stable-runtime-benchmarks	31m 27s
test-linux-stable-int	9m 50s
test-linux-stable-no-try-runtime (1/2)	40m 49s
test-linux-stable-no-try-runtime (2/2)	26m 13s
test-linux-stable (1/3, parity-large)	35m 13s
test-linux-stable (1/3, parity-oldlinux)	36m 31s
test-linux-stable (2/3, parity-large)	23m 24s
test-linux-stable (2/3, parity-oldlinux)	25m 19s
test-linux-stable (3/3, parity-large)	23m 2s
test-linux-stable (3/3, parity-oldlinux)	17m 55s
All tests passed	1s
	4h 31m 29s

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