Make t0 part1 and part2 be able to be rerun if failed (#12221)

Why I did it
With continueOnError: true, a failed job returns the result: partiallySuccess, which cause it can't be rerun, since AZP consider it as passed. Then we can't only rerun t0 jobs when it fails.

How I did it
Mark t0 part1 and part2 as continueOnError: false.

How to verify it
The pipeline will verify it.

azure-pipelines.yml

@@ -137,7 +137,7 @@ stages:
     pool: sonictest
     displayName: "kvmtest-t0-part1"
     timeoutInMinutes: 360
-    continueOnError: true
+    continueOnError: false
     steps:
     - template: .azure-pipelines/run-test-template.yml
       parameters:
@@ -151,7 +151,7 @@ stages:
     pool: sonictest
     displayName: "kvmtest-t0-part2"
     timeoutInMinutes: 360
-    continueOnError: true
+    continueOnError: false
     steps:
     - template: .azure-pipelines/run-test-template.yml
       parameters: