[ethereum/go-ethereum] CGO_ENABLED=0 signature_cgo.go:27:2 build constraints exclude all Go files (#17452)

That library is not correct. I know of at least @whyrusleeping who found some issues in the signature verification. It has not been battle tested, nor probably audited. We use it for some tests, but you should not rely on it. Please keep the C version of `secp256k1`.