Feat/fewer reductions #63

Job	Run time
Test (nightly)	33s
Test (mnt6_753/)	1m 6s
Check (stable)	34s
Check (nightly)	34s
Test (stable)	32s
Test (cp6_782/)	49s
List directories for parallelizing tests	5s
Test assembly	1m 10s
Test (mnt4_753/)	53s
Check no_std	21s
Check Documentation	1m 2s
Check Style	16s
Test (./secq256k1)	45s
Test (./mnt4_298)	48s
Test (./ed_on_cp6_782)	42s
Test (./curve25519)	49s
Test (./ed25519)	40s
Test (./ed_on_mnt4_298)	42s
Test (./ed_on_bls12_381)	48s
Test (./grumpkin)	53s
Test (./bls12_377)	50s
Test (./mnt6_298)	48s
Test (./bn254)	52s
Test (./ed_on_bls12_381_bandersnatch)	45s
Test (./ed_on_bn254)	43s
Test (./ed_on_bls12_377)	49s
Test (./ed_on_mnt4_753)	47s
Test (./bls12_381)	53s
Test (./bw6_761)	47s
Test (./secp384r1)	47s
Test (./pallas)	49s
Test (./vesta)	53s
Test (./ed_on_bw6_761)	47s
Test (./secp256k1)	50s
Test (./bw6_767)	53s
Test (./secp256r1)	37s
	26m 52s

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