Move ubuntu2004-aarch64 jobs into production

Move ubuntu2004-aarch64 jobs into production

- move ubuntu2004-aarch64 merge/verify jobs from
  beta into production on master as required for
  https://gerrit.fd.io/r/c/vpp/+/30734

- remove beta job definitions

- refactor os job add/remove from separate
  project definitions to exclude list in
  vpp-<arch> project definitions

- handle errors when parsing yaml files in
  dbld_csit_find_ansible_packages.py

Change-Id: Ife651a6b85c6c3872255f15bd87ede499ee78b22
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>