Optimizing pr ci coverage (#46427)

* it is a test for my idea,test=coverage

* it is a test,test=coverage

* it is a test,test=coverage

* optimizing coverage ci for build develop twice

* it is a test to delete a unnitest,test=coverage

* optimizing pr ci coverage

paddle/scripts/paddle_build.sh

@@ -1154,10 +1154,6 @@ function check_diff_file_for_coverage() {
 
 function check_change_of_unittest() {
     generate_unittest_spec "PR"
-    fetch_upstream_develop_if_not_exist
-    git reset --hard upstream/$BRANCH
-    cmake_gen $1
-    generate_unittest_spec "DEV"
     check_approvals_of_unittest 2
 }
 

tools/check_added_ut.sh

@@ -53,6 +53,9 @@ elif [[ "$SYSTEM" == "Windows_NT" ]];then
 fi
 # remove line ended with .exe to get correct deleted_ut list
 ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' | sed 's/ //g' | sed '/\.exe$/d' | grep 'test' > $PADDLE_ROOT/br-ut
+#UNITTEST_DEV.spec is used for checking changes of unnitests between pr and paddle_develop in the later step
+spec_path=${PADDLE_ROOT}/paddle/fluid/UNITTEST_DEV.spec
+ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' > ${spec_path}
 cd $PADDLE_ROOT/build
 ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' | sed 's/ //g' | sed '/\.exe$/d' | grep 'test' > $PADDLE_ROOT/pr-ut
 cd $PADDLE_ROOT