[CI] Automatic retries for integration tests (#5145)

* [CI] Automatic retries for integration tests. New GCP SA

* Reverted SA usage

Author: pazone

.buildkite/integration.pipeline.yml

@@ -29,6 +29,9 @@ steps:
     artifact_paths:
       - "build/TEST-**"
       - "build/diagnostics/*"
+    retry:
+      automatic:
+        - limit: 1
     agents:
       provider: "gcp"
       machineType: "n1-standard-8"
@@ -50,6 +53,9 @@ steps:
     artifact_paths:
       - "build/TEST-**"
       - "build/diagnostics/*"
+    retry:
+      automatic:
+        - limit: 1
     agents:
       provider: "gcp"
       machineType: "n1-standard-8"
@@ -71,6 +77,9 @@ steps:
     artifact_paths:
       - "build/TEST-**"
       - "build/diagnostics/*"
+    retry:
+      automatic:
+        - limit: 1
     agents:
       provider: "gcp"
       machineType: "n1-standard-8"
@@ -90,12 +99,12 @@ steps:
       buildkite-agent artifact download build/distributions/** . --step 'package-it'
       .buildkite/scripts/steps/beats_tests.sh
     # if: "build.env('CRON') == 'yes'"
+    retry:
+      automatic:
+        - limit: 1
     agents:
       provider: "gcp"
       machineType: "n1-standard-8"
-    retry:
-      manual:
-        allowed: true
     notify:
       - github_commit_status:
           context: "buildkite/elastic-agent-extended-testing - Serverless Beats Tests"