[TD-10750]remove default checkout in jenkin

Jenkinsfile

@@ -2,7 +2,6 @@ import hudson.model.Result
 import jenkins.model.CauseOfInterruption
 properties([pipelineTriggers([githubPush()])])
 node {
-    git url: 'https://github.com/taosdata/TDengine.git'
 }
 
 
@@ -114,7 +113,7 @@ def pre_test(){
 
 pipeline {
   agent none
-  
+  options { skipDefaultCheckout() } 
   environment{
       WK = '/var/lib/jenkins/workspace/TDinternal'
       WKC= '/var/lib/jenkins/workspace/TDinternal/community'
@@ -123,6 +122,7 @@ pipeline {
   stages {
       stage('pre_build'){
           agent{label 'master'}
+          options { skipDefaultCheckout() } 
           when {
               changeRequest()
           }
@@ -174,6 +174,7 @@ pipeline {
     
       stage('Parallel test stage') {
         //only build pr
+        options { skipDefaultCheckout() } 
         when {
           allOf{
               changeRequest()