Use Bazel-built Magma Debian package in FEG integ test workflow

[LKreutzer]

• build_and_start_magma does a Make build of the AGW <- called by build_agw <- executed in the FEG integ tests.

  • Needs to be replaced with a Debian package download.
    • This could save more than an hour in build time!
  • Use the Bazel-built Debian package.
  • If the magma-deb VM cannot be used at all do a Bazel build for the services instead.
  • Found in Make to Bazel switchover for the AGW #14835

• Delete step is not working:

     - uses: geekyeggo/delete-artifact@54ab544f12cdb7b71613a16a2b5a37a9ade990af # pin@v2.0.0
       with:
         name: |
           docker-build-orc8r-images |
           docker-build-feg-images

Remove the | to fix the syntax.