ecdsa: enable and fix workspace-level lints #2527

Job	Run time
test (stable)	26s
build (wasm32-unknown-unknown, 1.85.0)	21s
test (1.85.0)	24s
build (thumbv7em-none-eabi, stable)	22s
build (thumbv7em-none-eabi, 1.85.0)	18s
build (wasm32-unknown-unknown, stable)	19s
	2m 10s

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