Merge pull request #8076 from taosdata/gotest_proxy

<test>: set go proxy as goproxy.cn to let CI runing

tests/gotest/batchtest.bat

@@ -9,7 +9,7 @@ if "%severIp%"=="" (set severIp=127.0.0.1)
 if "%serverPort%"=="" (set serverPort=6030)
 
 go env -w GO111MODULE=on
-go env -w GOPROXY=https://goproxy.io,direct
+go env -w GOPROXY=https://goproxy.cn,direct
 
 cd case001
 case001.bat %severIp% %serverPort%  

tests/gotest/batchtest.sh

@@ -14,7 +14,7 @@ if [ ! -n "$serverPort" ]; then
 fi
 
 go env -w GO111MODULE=on
-go env -w GOPROXY=https://goproxy.io,direct
+go env -w GOPROXY=https://goproxy.cn,direct
 
 bash ./case001/case001.sh $severIp $serverPort
 bash ./case002/case002.sh $severIp $serverPort