release: use gnu xargs in CI (#4808)

Author: jackfrancis

.github/workflows/release.yaml

@@ -181,7 +181,7 @@ jobs:
           AZURE_CORE_ONLY_SHOW_ERRORS: True
         run: make test-kubernetes
       - name: Remove untracked files created during workflow steps
-        run: git ls-files --others --exclude-standard -z | xargs -0 rm
+        run: git ls-files --others --exclude-standard -z | xargs -0 -r rm
       - name: Add local tag
         run: git tag ${{ env.RELEASE_VERSION }}
       - name: print and validate git status before producing binaries