extension_ci: Use different target for nextest (#47738)

Release Notes:

- N/A

.github/workflows/extension_tests.yml

@@ -76,7 +76,7 @@ jobs:
     - name: steps::cargo_install_nextest
       uses: taiki-e/install-action@nextest
     - name: steps::cargo_nextest
-      run: cargo nextest run --workspace --no-fail-fast
+      run: 'cargo nextest run --workspace --no-fail-fast --target "$(rustc -vV | sed -n ''s|host: ||p'')"'
       shell: bash -euxo pipefail {0}
       env:
         NEXTEST_NO_TESTS: warn