[Cherry-pick][XPU][CI] fix logs update bug (#7915)

* Update _xpu_4cards_case_test.yml

* Update _xpu_8cards_case_test.yml

Author: plusNew001

.github/workflows/_xpu_4cards_case_test.yml

@@ -213,6 +213,7 @@ jobs:
 
       - name: Upload case logs
         if: always()
+        continue-on-error: true
         uses: actions/upload-artifact@v6
         with:
           name: xpu-4cards-case-logs

.github/workflows/_xpu_8cards_case_test.yml

@@ -201,6 +201,7 @@ jobs:
 
       - name: Upload case logs
         if: always()
+        continue-on-error: true
         uses: actions/upload-artifact@v6
         with:
           name: xpu-8cards-case-logs