udpate CI for cross-arch docker, release candidates

[sudermanjr]

This PR fixes #531

Checklist

• I have signed the CLA
• I have updated/added any relevant documentation

Description

What's the goal of this PR?

Update CI to our standards.

What changes did you make?

• Replace original Dockerfile with the Dockerfile-go and remove Dockerfile-go
• Update .goreleaser.yml to include prereleases, cross-arch builds, and signing
• Update circleci to account for all of this.
• Push images to gcr instead of quay
• remove the go- from the docker tags in gcr

NOTE:

I used a different regex for the release steps. I think we shouldn't be publishing docs on release candidates, so I filtered them out. We run goreleaser on all valid vx.x.x tags.

What alternative solution should we consider, if any?

n/a

[lucasreed]

LGTM

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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