Build auctioneer docker image in CI

[itamarreif]

We should build the auctioneer image in CI. Since it hasn't been added to CI, the current workflow requires rebuilding the image locally and loading it into the cluster.

This is complicated by the fact that there are multiple in flight prs for adding the chart, the binary, modifications to the sequencer, etc. that all require changing branches before rebuilding the image.

┆Issue Number: ENG-1020