Replace derivative with educe (#832) #2897

Job	Run time
Check Style	11s
Check Documentation	1m 4s
Check (stable)	7s
List directories for parallelizing tests	6s
Test (stable)	9m 58s
Check (nightly)	1m 12s
Test (nightly)	17m 56s
Test (mnt4_753/)	15m 39s
Test (mnt6_753/)	20s
Check no_std	38s
Test assembly	8m 35s
Test (cp6_782/)	9s
Test (./ed25519)	1m 21s
Test (./mnt6_298)	5m 41s
Test (./grumpkin)	1m 17s
Test (./ed_on_cp6_782)	1m 29s
Test (./ed_on_mnt4_753)	3m 56s
Test (./ed_on_bw6_761)	51s
Test (./bls12_381)	3m 33s
Test (./ed_on_bls12_381_bandersnatch)	1m 14s
Test (./ed_on_mnt4_298)	1m 14s
Test (./secq256k1)	1m 6s
Test (./bn254)	2m 18s
Test (./mnt4_298)	3m 56s
Test (./secp256r1)	1m 15s
Test (./vesta)	1m 15s
Test (./ed_on_bn254)	1m 8s
Test (./bw6_761)	4m 0s
Test (./curve25519)	1m 4s
Test (./pallas)	1m 11s
Test (./ed_on_bls12_377)	1m 16s
Test (./secp384r1)	1m 26s
Test (./secp256k1)	1m 40s
Test (./ed_on_bls12_381)	1m 30s
Test (./bls12_377)	4m 25s
Test (./bw6_767)	4m 3s
	1h 48m 4s

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