ecdsa

ecdsa: move `Array*` bounds to `EcdsaCurve` #2780

Job	Run time
test (1.85.0)	37s
no_std (wasm32-unknown-unknown, 1.85.0)	29s
no_std (thumbv7em-none-eabi, 1.85.0)	32s
test (stable)	32s
no_std (thumbv7em-none-eabi, stable)	30s
no_std (wasm32-unknown-unknown, stable)	32s
	3m 12s

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