Make ECDSA signature verification customizable #6027

Job	Run time
cargo-spellcheck	3m 1s
check-features	8m 46s
cargo-deny (bans licenses sources)	28s
check-no-std	3m 41s
check-rustdoc-links	3m 38s
clippy	46s
test-32bits	9m 47s
fmt	27s
test-64bits	12m 32s
wasm-node-check	6m 10s
wasm-node-versions-match	25s
all-ci	1s
	49m 42s

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