CP-7782 - Replace E2E pipeline execution with serverless-quality-gate… (

#3981)

.buildkite/pipeline.tests-production.yaml

@@ -2,14 +2,17 @@
 # A failure in this pipeline build will prevent further progression to the subsequent stage.
 
 steps:
-  - label: ":pipeline::rocket::seedling: Trigger control-plane e2e tests"
+
+  - label: ":rocket: Run serverless synthetics check"
     if: build.env("ENVIRONMENT") == "production-canary"
-    trigger: "ess-k8s-production-e2e-tests" # https://buildkite.com/elastic/ess-k8s-production-e2e-tests
+    trigger: "serverless-quality-gates"
     build:
-      env:
-        REGION_ID: aws-us-east-1
-        NAME_PREFIX: ci_test_fleet-promotion_
       message: "${BUILDKITE_MESSAGE} (triggered by pipeline.tests-production-canary.yaml)"
+      env:
+        TARGET_ENV: production
+        SERVICE: fleet
+        CHECK_SYNTHETICS: true
+        CHECK_SYNTHETICS_TAG: serverless-platform-core-validation
 
   - label: ":cookie: 1h bake period before continuing promotion"
     if: build.env("ENVIRONMENT") == "production-canary"