Using the acceptance buildr in the 'promote' job.

Signed-off-by: Abhijit Gadgil <agadgil@progress.com>

Author: agadgil-progress

.expeditor/release_habitat.pipeline.yml

@@ -535,3 +535,5 @@ steps:
       executor:
         docker:
           privileged: true
+          environment:
+            - JOB_HAB_BLDR_URL=https://bldr.acceptance.habitat.sh

.expeditor/scripts/release_habitat/promote_artifacts_to_dev.sh

@@ -19,6 +19,14 @@ source .expeditor/scripts/release_habitat/shared.sh
 
 export HAB_BLDR_URL="${PIPELINE_HAB_BLDR_URL}"
 
+# The following holds true only for aarch64-darwin as we are only setting that
+# environment variable for macos aarch64 jobs. TODO: Remove it once we start
+# using the SAAS builder for macOS
+if [[ -n "${JOB_HAB_BLDR_URL:-}" ]]; then
+    export HAB_BLDR_URL="${JOB_HAB_BLDR_URL}"
+    export HAB_AUTH_TOKEN="${ACCEPTANCE_HAB_AUTH_TOKEN}"
+fi
+
 # Take advantage of the fact that we're just promoting and we can run
 # 100% on linux
 declare -g hab_binary