[CI] Fix Core DRA crossbuild (#7203) (#7246)

* [CI] Fix DRA crossbuild

* Added staging fix

* Fixed mistype

* Fixed darwin build

* Update .buildkite/pipeline.elastic-agent-binary-dra.yml

Co-authored-by: Paolo Chilà <paolo.chila@elastic.co>

* Update .buildkite/pipeline.elastic-agent-binary-dra.yml

Co-authored-by: Paolo Chilà <paolo.chila@elastic.co>

* replaced commas with spaces

---------

Co-authored-by: Paolo Chilà <paolo.chila@elastic.co>
(cherry picked from commit d0548da)

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

.buildkite/pipeline.elastic-agent-binary-dra.yml

@@ -13,17 +13,32 @@ steps:
     # don't run snapshot builds with prereleases (non empty VERSION_QUALIFIER) unless forced (RUN_SNAPSHOT=true)
     if: build.env("RUN_SNAPSHOT") == "true" || (build.env('VERSION_QUALIFIER') == null && (build.branch == 'main' || build.branch =~ /^[0-9]+\.[0-9x]+\$/))
     steps:
-    - label: ":package: Build Elastic-Agent Core Snapshot"
+    - label: ":package: Elastic-Agent Core Snapshot"
       commands:
         - .buildkite/scripts/steps/build-agent-core.sh
-      key: "build-dra-snapshot"
+      key: "build-dra-snapshot-x86"
       artifact_paths:
         - "build/distributions/**/*"
       agents:
         provider: "gcp"
         machineType: "c2-standard-16"
       env:
         DRA_WORKFLOW: "snapshot"
+        PLATFORMS: "linux/amd64 windows/amd64 darwin/amd64 darwin/arm64"
+
+    - label: ":package: linux/arm64 Elastic-Agent Core Snapshot"
+      commands:
+        - .buildkite/scripts/steps/build-agent-core.sh
+      key: "build-dra-snapshot-arm"
+      artifact_paths:
+        - "build/distributions/**/*"
+      agents:
+        provider: "aws"
+        instanceType: "c6g.4xlarge"
+        imagePrefix: "core-ubuntu-2204-aarch64"
+      env:
+        DRA_WORKFLOW: "snapshot"
+        PLATFORMS: "linux/arm64"
 
     - wait
 
@@ -46,18 +61,34 @@ steps:
     key: "dra-core-staging"
     if: build.branch =~ /^[0-9]+\.[0-9x]+\$/ || build.env("RUN_STAGING") == "true" || build.env('VERSION_QUALIFIER') != null
     steps:
-    - label: ":package: Build Elastic-Agent Core staging"
+    - label: ":package: Elastic-Agent Core staging"
       commands: |
         source .buildkite/scripts/version_qualifier.sh
         .buildkite/scripts/steps/build-agent-core.sh
-      key: "build-dra-staging"
+      key: "build-dra-staging-x86"
       artifact_paths:
         - "build/distributions/**/*"
       agents:
         provider: "gcp"
         machineType: "c2-standard-16"
       env:
         DRA_WORKFLOW: "staging"
+        PLATFORMS: "linux/amd64 windows/amd64 darwin/amd64 darwin/arm64"
+
+    - label: ":package: linux/arm64 Elastic-Agent Core staging"
+      commands: |
+        source .buildkite/scripts/version_qualifier.sh
+        .buildkite/scripts/steps/build-agent-core.sh
+      key: "build-dra-staging-arm"
+      artifact_paths:
+        - "build/distributions/**/*"
+      agents:
+        provider: "aws"
+        instanceType: "c6g.4xlarge"
+        imagePrefix: "core-ubuntu-2204-aarch64"
+      env:
+        DRA_WORKFLOW: "dra-core-staging"
+        PLATFORMS: "linux/arm64"
 
     - wait