Extract the canary-arm64 job into a reusable ceph-arm64-suite-test.yml
workflow, matrixed on a ceph_images input, matching the
ceph-suite-tests/canary-tests reusable-workflow pattern. The matrix
currently carries only the image already used by default
(quay.io/ceph/ceph:v20), so this is a pure refactor with no change in
test coverage. Adding or changing an arm64 test image is now a one-line
variable update.
Signed-off-by: Pasan <pasan.chamikara@owasp.org>