Funding Fraud now completes on provideFundingECDSAFraudProof
and always costs the signers
their full bond as long as the funding
timeout has not elapsed

temove tests for notifyFraudFundingTimeout
and provideFraudBTCFundingProof

partiallySlashForFraudInFunding was
only called by notifyFraudFundingTimeout, which
was removed

If the funding proof timeout has elpased, the funder does not recieve
the signer bond. It is burned instead.

Test that the signer bond is always seized and
the funder is awarded the bond if the timeout has not elapsed.

Bond can be a const assigned directly

provideFundingECDSAFraudProof should always transfer signer bond to funder.

This avoids some signer griefing vectors while simplifying the logic

provideFundingECDSAFraudProof time disctinction was removed.