Fix missing docker staging DRA artifacts (#39297) (#39302)

The DRA staging release is failing because the Buildkite step isn't capturing the right artifacts.
This commit fixes the issue by adjusting the artifact_paths to match the other steps.

(cherry picked from commit 85c9d14)

Co-authored-by: Dimitrios Liappis <dimitrios.liappis@gmail.com>

.buildkite/packaging.pipeline.yml

@@ -192,7 +192,7 @@ steps:
  imagePrefix: "${AWS_IMAGE_UBUNTU_ARM_64}"
  instanceType: "${AWS_ARM_INSTANCE_TYPE}"
  artifact_paths:
- - build/distributions/**
+ - build/distributions/**/*
  matrix:
  - auditbeat
  - filebeat