don't scale-encode witness data #22285

Job	Run time
filter-changes	11s
build (ubuntu-22.04)	2m 20s
build (ubuntu-latest-arm-8-cores)	2m 47s
build (self-hosted, macOS, ARM64, go-spacemesh)	29s
test-contracts	3m 21s
quicktests	2m 31s
coverage	20m 58s
lint	4m 3s
unittests (ubuntu-22.04)	23m 32s
unittests (ubuntu-latest-arm-8-cores)	23m 34s
unittests (self-hosted, macOS, ARM64, go-spacemesh)	23m 17s
ci-status	4s
	1h 47m 7s

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