`PublicKey.Verify()` method should fail on high-S signatures

[tkiapril]

At the moment, PublicKey.Verify() method is agnostic of whether the signature is on the high-S side of the ECDSA curve, or on the low-S side. However, according to BIP-146, only the low-S signature should be used (as there can be two signatures (high-S and low-S) for a given message.) As such, this method should fail to verify the message whenever the high-S signature is used.

For reference:

• Discussion on Discord: https://discord.com/channels/928926944937013338/970554437733073027/1086185911986954280
• #2957, which was an attempt to match the current behavior of PublicKey.Verify()

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