Ensure safe Uint64/32 instanciations, with new Unsafe.fromField() #3480

Job	Run time
Build-And-Test-Server (Simple integration tests)	17m 33s
Build-And-Test-Server (DEX integration tests)	12m 58s
Build-And-Test-Server (DEX integration test with proofs)	13m 5s
Build-And-Test-Web	4m 34s
Build-And-Test-Server (Voting integration tests)	5m 30s
Build-And-Test-Server (Unit tests)	35m 44s
Build-And-Test-Server (Verification Key Regression Check)	10m 56s
Build-And-Test-Server (CommonJS test)	2m 36s
Release-mina-signer-on-NPM	1m 53s
Release-on-NPM	1m 42s
	1h 46m 31s

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