Add onboarding dualtor PR checker (sonic-net#19503)

In this PR, we add a new PR checker called onboarding dualtor. This new PR checker is for onboarding dualtor speific test scripts.

azure-pipelines.yml

@@ -295,6 +295,23 @@ stages:
  MGMT_BRANCH: $(BUILD_BRANCH)
  TEST_SET: onboarding_t1
 
+ - job: onboarding_elastictest_dualtor
+ displayName: "onboarding dualtor testcases by Elastictest - optional"
+ timeoutInMinutes: 240
+ continueOnError: true
+ pool: sonic-ubuntu-1c
+ steps:
+ - template: .azure-pipelines/run-test-elastictest-template.yml@sonic-mgmt
+ parameters:
+ TOPOLOGY: dualtor
+ STOP_ON_FAILURE: "False"
+ RETRY_TIMES: 0
+ MIN_WORKER: $(T0_DUALTOR_INSTANCE_NUM)
+ MAX_WORKER: $(T0_DUALTOR_INSTANCE_NUM)
+ KVM_IMAGE_BRANCH: $(BUILD_BRANCH)
+ MGMT_BRANCH: $(BUILD_BRANCH)
+ TEST_SET: onboarding_dualtor
+
 # - job: wan_elastictest
 # displayName: "kvmtest-wan by Elastictest"
 # pool: sonic-ubuntu-1c