[CI] Serverless beats tests migration to beats (#7184) (#7214)

* Migreate Serverless beats tests to beats

* Removed PR notification context

* Remove concurrency group

* Removed artifacts download

* Removed Serverless beats tests from the integration pipeline

(cherry picked from commit 9366b72)

# Conflicts:
#	.buildkite/integration.pipeline.yml

Co-authored-by: Pavel Zorin <[email protected]>

Author: mergify[bot]

Diff for: .buildkite/integration.pipeline.yml

@@ -169,25 +169,3 @@ steps:
     depends_on:
       - int-packaging
     command: "buildkite-agent pipeline upload .buildkite/bk.integration.pipeline.yml"
-
-  - label: "Serverless Beats Tests"
-    depends_on:
-      - int-packaging
-    key: "serverless-beats-integration-tests"
-    concurrency_group: elastic-agent-extended-testing/beats-integration
-    concurrency: 8
-    retry:
-      automatic:
-        limit: 1
-    env:
-      TEST_INTEG_AUTH_GCP_DATACENTER: "us-central1-a"
-    command: |
-      buildkite-agent artifact download "build/distributions/**" . $BUILDKITE_BUILD_ID
-      .buildkite/scripts/steps/beats_tests.sh
-    agents:
-      provider: "gcp"
-      machineType: "n2-standard-8"
-    notify:
-      - github_commit_status:
-          context: "buildkite/elastic-agent-extended-testing - Serverless Beats Tests"
-

Diff for: .buildkite/serverless.beats.tests.yml

@@ -0,0 +1,17 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/buildkite/pipeline-schema/main/schema.json
+
+env:
+  DOCKER_REGISTRY: "docker.elastic.co"
+  VAULT_PATH: "kv/ci-shared/observability-ingest/cloud/gcp"
+
+steps:
+  - label: "Serverless Beats Tests"
+    key: "serverless-beats-integration-tests"
+    retry:
+      automatic:
+        limit: 1
+    command: |
+      .buildkite/scripts/steps/beats_tests.sh
+    agents:
+      provider: "gcp"
+      machineType: "n2-standard-8"