update go.mod deps

[deitch]

- What I did

Updated the docker/docker, moby/moby, moby/buildkit, oras.land/oras-go and estesp/manifest-tool dependencies.

Most are on the latest; the only one I cannot get to latest (and thus remains with a replace on go.mod) is oras.land/oras-go. This is because estesp/manifest-tool depends upon an older version of it, which, in turn, depends on an older version of docker/docker, etc. If we can update manifest-tool, we should be able to get this as well.

- How I did it

Lots of go get -u followed by go mod tidy and go mod vendor, and then testing

- How to verify it

CI. If it builds and runs, it works.

- Description for the changelog

Update library dependencies