Bench

Add cache for scaled polys/polyvecs in NTT domain #248

Job	Run time
Arm Cortex-A72 (Raspberry Pi 4) benchmarks	2m 56s
Arm Cortex-A76 (Raspberry Pi 5) benchmarks	59s
Arm Cortex-A55 (Snapdragon 888) benchmarks	3m 19s
Graviton2 non-opt / Start Graviton2 (t4g.small)	1m 3s
Graviton2 opt / Start Graviton2 (t4g.small)	1m 6s
Graviton3 non-opt / Start Graviton3 (c7g.medium)	1m 2s
Graviton3 opt / Start Graviton3 (c7g.medium)	1m 1s
Graviton3 opt / Bench Graviton3	4m 49s
Graviton3 non-opt / Bench Graviton3	2m 4s
Graviton2 non-opt / Bench Graviton2	2m 34s
Graviton2 opt / Bench Graviton2	3m 39s
Graviton3 non-opt / Stop Graviton3 (c7g.medium)	4s
Graviton2 non-opt / Stop Graviton2 (t4g.small)	5s
Graviton2 opt / Stop Graviton2 (t4g.small)	3s
Graviton3 opt / Stop Graviton3 (c7g.medium)	5s
	24m 49s

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