--freshen takes too long

[lcarva]

Running the following command:

ec --debug track bundle \
  --input "quay.io/redhat-appstudio-tekton-catalog/data-acceptable-bundles:latest" \
  --freshen

Takes about 4 1/2 minutes.

It looks like part of the problem is that freshen selects almost 300 image refs to query. It is a large data source so this is somewhat expected.

Let's consider ways that we can speed this up a bit. My computer had low cpu and network usage during the period which suggests we should get some improvements if we check those refs in parallel.

Also, some of the tags represent a git commit. Maybe we can ignore those? That should reduce the amount of queries significantly.