ecdsa

ecdsa: move `Array*` bounds to `EcdsaCurve` #2781

Job	Run time
no_std (wasm32-unknown-unknown, 1.85.0)	1m 9s
test (1.85.0)	36s
no_std (thumbv7em-none-eabi, stable)	1m 8s
test (stable)	36s
no_std (wasm32-unknown-unknown, stable)	1m 6s
no_std (thumbv7em-none-eabi, 1.85.0)	1m 4s
	5m 39s

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