Add infrastructure for build-cd that lets Model Deployment Repos know when there is an update to build-cd.

[CodeGat]

Since we version our Infrastructure now, we should let Model Deployment Repositories know when it is updated.

Consider either a dependabot update: https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuring-dependabot-version-updates for model deployment repos, or essentially:

for repo in $model_deployment_repos; do
  gh issue create "Update for `build-cd`" --repo access-nri/$repo
done