Enable republish_images to have a source tag filter

[dmikusa]

What happened?

At the present moment, the republish_images job will assume that one source repository is used for one buildpack. If you have multiple buildpacks under a source repo then you will be tagging releases with some tag prefix, like buildpack-a-v1.0 and buildpack-b-v1.0.

This request is so that the job applies a filter like buildpack-a-* to fetch the right tag set (using git tag -l might be an option in the scripts). It will also need to parse out the version, as we need the version in the scripts. This might require a regex with a capture group, but other options are acceptable too.

Build Configuration

• What platform (pack, kpack, tekton buildpacks plugin, etc.) are you
  using? Please include a version.

• What buildpacks are you using? Please include versions.

• What builder are you using? If custom, can you provide the output from pack inspect-builder <builder>?

• Can you provide a sample app or relevant configuration (buildpack.yml,
  nginx.conf, etc.)?

Checklist

• I have included log output.
• The log output includes an error message.
• I have included steps for reproduction.

[dmikusa]

Closed by #543

[andrew-su]

Looks like https://github.com/paketo-buildpacks/pipeline-builder/blob/main/octo/compute-version.sh used by builder and package may need to be updated to handle tags differently too.