When eth_estimateGas or eth_call is invoked with an authorizationList
containing unsigned (zero-signature) entries, the signature recovery
fails and the authorization is silently skipped. This means the
sender's account never receives the delegated code, producing an
incorrect gas estimate.
Fix this by falling back to msg.From as the authority when signature
recovery fails in simulation mode (SkipTransactionChecks). Also skip
authorization nonce validation when SkipNonceChecks is set, consistent
with the existing sender nonce skip behaviour.
Fixes#31617
a27bd32d26