Currently bedevere does the following things:

• checks if a bpo link is present in the PR
  • this check is no longer necessary for bpo
  • it might need to be updated to check for a GH or bpo issue
  • eventually the bpo check could be removed
• adds a link to PRs that points to the corresponding bpo issues
  • the link should be updated to use the bpo-* form to enable redirects
    • is it possible to update existing links?
  • it might need to add links to the GH issues
  • eventually the bpo link addition can be removed
• adds labels automatically
  • the label names will be updated
  • see Renaming labels on python/cpython core-workflow#432

cc @brettcannon