[NPU] update npu ut skil scirpts, test=develop (#35360)

* [NPU] update npu ut skil scirpts, test=develop

* update, test=develop

* update scripst, test=develop

* add debug code, test=develop

* update

paddle/scripts/paddle_build.sh

@@ -1703,11 +1703,13 @@ set -x
 
 function parallel_test_base_npu() {
     # skipping if no NPU related files changed
-    if [ ${SKIL_NPU_TEST:-ON} == "ON" ] ; then
-        npu_cc_files=$(git diff --name-only ${BRANCH} | grep "op_npu.cc" | wc -l)
-        npu_py_files=$(git diff --name-only ${BRANCH} | grep "python/paddle/fluid/tests/unittests/npu" | wc -l)
-        if [ "${npu_cc_files}" -eq 0 ] && [ "${npu_py_files}" -eq 0 ] ; then
-            echo "NO NPU operators files changed, skip NPU unit tests"
+    if [ ${SKIP_NPU_TEST:-ON} == "ON" ] ; then
+        fetch_upstream_develop_if_not_exist
+        git diff --name-only remotes/upstream/$BRANCH
+        npu_cc_changes=$(git diff --name-only remotes/upstream/$BRANCH | grep "op_npu.cc" || true)
+        npu_py_changes=$(git diff --name-only remotes/upstream/$BRANCH | grep "op_npu.py" || true)
+        if [ -z "${npu_cc_changes}" ] && [ -z "${npu_py_changes}" ] ; then
+            echo "NO NPU operators files changed, skip NPU unit tests!"
             exit 0
         fi
     fi