ecdsa: fix `new_wycheproof_test!` macro (#770) #1328

Job	Run time
build (thumbv7em-none-eabi, 1.71.0)	18s
test (1.71.0)	19s
build (thumbv7em-none-eabi, stable)	21s
test (stable)	11s
build (wasm32-unknown-unknown, 1.71.0)	19s
build (wasm32-unknown-unknown, stable)	13s
	1m 41s

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