chore(ci): consolidate Node version reference in CI to associated .nvmrc (#32192)

Signed-off-by: hainenber <dotronghai96@gmail.com>

.github/workflows/embedded-sdk-test.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: "20"
+          node-version-file: './superset-embedded-sdk/.nvmrc'
           registry-url: 'https://registry.npmjs.org'
       - run: npm ci
       - run: npm test