add checkout

Author: sharifnasser

.pipelines/multitenancy/swiftv2-singularity-e2e.stages.yaml

@@ -11,12 +11,13 @@ stages:
       - ${{ parameters.dependsOn }}
       - setup
     jobs:
-      - job: swiftv2_manifold_e2e
+      - job: run_tests
         displayName: AKS Swiftv2 Multitenancy Manifold E2E Test Suite
         pool:
           name: $(BUILD_POOL_NAME_DEFAULT)
+          isCustom: true
+          type: linux
         steps:
-          - checkout: azure-container-networking
           - task: TriggerBuild@3
             inputs:
               buildDefinition: '391699'