performance: (~3x) optimize field multiplier and EC-adder for improved MSM and ECNTT #739

Job	Run time
check-changed-files / Check Changed Files	5s
extract-cuda-backend-branch / Extract cuda branch name	3s
Check Code Format	14s
Test on Linux (bn254, -DG2=ON -DECNTT=ON)	24m 17s
Test on Linux (babybear, -DEXT_FIELD=ON)	6m 55s
Test on Linux (bls12_381, -DG2=ON -DECNTT=ON)	26m 8s
Test on Linux (stark252, -DEXT_FIELD=OFF)	11m 9s
Test on Linux (bls12_377, -DG2=ON -DECNTT=ON)	13m 36s
Test on Linux (m31, -DEXT_FIELD=ON)	2m 10s
Test on Linux (bw6_761, -DG2=ON -DECNTT=ON)	29m 57s
Test on Linux (grumpkin)	3m 13s
	1h 57m 47s

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