Small refactor #3095

Job	Run time
Check no_std	39s
Check (stable)	19s
Check (nightly)	1m 9s
List directories for parallelizing tests	3s
Check Documentation	1m 0s
Check Style	14s
Test (stable)	9m 2s
Test (nightly)	17m 31s
Test assembly	8m 24s
Test (cp6_782/)	9s
Test (mnt4_753/)	16m 49s
Test (mnt6_753/)	9s
Test (./ed_on_mnt4_753)	3m 46s
Test (./secp256r1)	57s
Test (./ed_on_mnt4_298)	1m 4s
Test (./ed_on_cp6_782)	1m 18s
Test (./mnt4_298)	3m 42s
Test (./mnt6_298)	5m 27s
Test (./ed_on_bn254)	58s
Test (./bn254)	2m 14s
Test (./secp256k1)	1m 1s
Test (./bw6_761)	4m 4s
Test (./bls12_377)	4m 4s
Test (./grumpkin)	1m 8s
Test (./secp384r1)	1m 23s
Test (./ed_on_bls12_377)	1m 3s
Test (./secq256k1)	58s
Test (./ed25519)	54s
Test (./ed_on_bls12_381)	1m 13s
Test (./ed_on_bw6_761)	57s
Test (./curve25519)	1m 32s
Test (./ed_on_bls12_381_bandersnatch)	59s
Test (./pallas)	1m 6s
Test (./vesta)	1m 20s
Test (./bw6_767)	3m 51s
Test (./bls12_381)	3m 26s
	1h 43m 53s

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