chore(ci): switch to dd-pkg for publishing public ADP container images

.gitlab/release.yml

@@ -1,4 +1,24 @@
+.docker_publish_job_definition:
+  image: registry.ddbuild.io/agent-delivery/dd-pkg:v0.9.0
+  variables:
+    IMG_SIGNING: "false"
+    PUBLIC_IMAGES_PUBLISH_TIMEOUT: "1800"
+  script:
+    - |
+      set -euo pipefail
+      dd-pkg version
+      args=(publish-image --timeout "${PUBLIC_IMAGES_PUBLISH_TIMEOUT}" --poll-interval 30 --signing="${IMG_SIGNING}")
+      if [[ -n "${IMG_REGISTRIES:-}" ]]; then args+=(--registries "${IMG_REGISTRIES}"); fi
+      if [[ -n "${IMG_SOURCES:-}" ]]; then args+=(--sources "${IMG_SOURCES}"); fi
+      if [[ -n "${IMG_DESTINATIONS:-}" ]]; then args+=(--destinations "${IMG_DESTINATIONS}"); fi
+      if [[ -n "${IMG_DESTINATIONS_REGEX:-}" ]]; then args+=(--regex-expression "${IMG_DESTINATIONS_REGEX}"); fi
+      if [[ -n "${IMG_DESTINATIONS_REGEX_REPL:-}" ]]; then args+=(--regex-replacement "${IMG_DESTINATIONS_REGEX_REPL}"); fi
+      if [[ -n "${IMG_TAG_REFERENCE:-}" ]]; then args+=(--tag-reference "${IMG_TAG_REFERENCE}"); fi
+      if [[ -n "${IMG_NEW_TAGS:-}" ]]; then args+=(--new-tags "${IMG_NEW_TAGS}"); fi
+      dd-pkg "${args[@]}"
+
 .publish-image-linux-definition:
+  extends: .docker_publish_job_definition
   stage: release
   rules:
     - if: !reference [.on_official_release, rules, if]
@@ -12,10 +32,6 @@
     - check-licenses
     - test-correctness-dsd-events
     - test-correctness-dsd-plain
-  trigger:
-    project: DataDog/public-images
-    branch: main
-    strategy: depend
   variables:
     IMG_REGISTRIES: public
     IMG_SOURCES: ${SOURCE_IMAGE}