Feature/smartaccount

[arnabmitra]

Description

This PR makes changes to the assumption that GetSigningTxData adapter in cosmos-sdk that SignerInfos always set a public key directly (i would argue only he signature should be used to derive the public key always.)

Also for WebAuthn signatures, the public key can be derived in from signature itself,
and has no correlation to the address itself(as can be the case in normal cosmos signatures flows),
the signature is compared against the pubkey registered while webauthn key registration, Additionally this doesn't really seem to be used anywhere else and does not affect normal cosmos verification flows.

The risk of this change is low in my opinion since the flow is used to compare the hash of the entire cosmos tx with the signature provided by the authentication mechanism.

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