* update ethereumapis deps
* V1AttToV1Alpha1 migration
* Implementation plus happy path test
* fix root variable names
* Invalid attestation test
* gzl
* mod tidy
* use a single append to concatenate two slices
* remove outdated comment from attestation processing
* invoke ProcessAttestationNoVerifySignature when validating attestations
* implement missing PoolMock members
* use new VerifyAttestationNoVerifySignature function