Efficient scalar mul and other Scalar improvements #3590

Job	Run time
Build-And-Test-Web	5m 47s
Build-And-Test-Server (Simple integration tests)	18m 17s
Build-And-Test-Server (DEX integration tests)	12m 39s
Build-And-Test-Server (DEX integration test with proofs)	12m 52s
Build-And-Test-Server (Voting integration tests)	5m 21s
Build-And-Test-Server (Unit tests)	19m 54s
Build-And-Test-Server (Verification Key Regression Check)	11m 22s
Build-And-Test-Server (CommonJS test)	2m 43s
Release-mina-signer-on-NPM	0s
Release-on-NPM	0s
	1h 28m 55s

Provide feedback