crypto: add crypto.signDigest() and crypto.verifyDigest() methods #4432

Job	Run time
Build slim tarball	2m 19s
x86_64-linux: with shared libraries	22m 16s
aarch64-darwin: with shared libraries	19m 46s
x86_64-darwin: with shared libraries	32m 37s
aarch64-linux: with shared libraries	18m 47s
	1h 35m 45s

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