[CI] Fix unified release ARM packaging (#7205) (#7253)

* [CI] Fix unified release ARM packaging

* [CI] Added missing ARM package types

* Packages: comma separaotrs

(cherry picked from commit aa9876d)

Co-authored-by: Pavel Zorin <pavel.zorin@elastic.co>

.buildkite/pipeline.elastic-agent-package.yml

@@ -60,6 +60,8 @@ steps:
           provider: "gcp"
           machineType: "c2-standard-16"
           diskSizeGb: 400
+        env:
+          PLATFORMS: "linux/amd64 windows/amd64 darwin/amd64 darwin/arm64"
         command: |
           if [[ -z "$${MANIFEST_URL}" ]]; then
             export MANIFEST_URL=$(buildkite-agent meta-data get MANIFEST_URL --default "")
@@ -82,7 +84,7 @@ steps:
           imagePrefix: "core-ubuntu-2004-aarch64"
         env:
           PLATFORMS: "linux/arm64"
-          PACKAGES: "docker"
+          PACKAGES: "docker,tar.gz,deb,rpm"
         command: |
           if [[ -z "$${MANIFEST_URL}" ]]; then
             export MANIFEST_URL=$(buildkite-agent meta-data get MANIFEST_URL --default "")