Efficient scalar mul and other Scalar improvements #3589

Job	Run time
Build-And-Test-Web	5m 27s
Build-And-Test-Server (Simple integration tests)	18m 20s
Build-And-Test-Server (DEX integration tests)	12m 38s
Build-And-Test-Server (DEX integration test with proofs)	12m 52s
Build-And-Test-Server (Voting integration tests)	5m 24s
Build-And-Test-Server (Unit tests)	37m 5s
Build-And-Test-Server (Verification Key Regression Check)	11m 17s
Build-And-Test-Server (CommonJS test)	2m 51s
Release-on-NPM	2m 10s
Release-mina-signer-on-NPM	3m 24s
	1h 51m 28s

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