ci: remove temporary npm auth token configuration step

[litianningdatadog]

Summary

• Stop fetching token from secret.
• Will rely on trusted deployment going forward (to be enabled by the Security team)

Test plan

• Verify the publish workflow runs successfully after this change
• Confirm npm packages are published correctly without the explicit token config step

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR removes an explicit npm authentication configuration step from the publish workflow, based on the claim that setup-node with registry-url already handles authentication via NODE_AUTH_TOKEN.

Changes:

• Removes the manual npm config set step that was explicitly configuring the npm authentication token for publishing

Comments suppressed due to low confidence (1)

.github/workflows/publish.yml:132

• The removed npm authentication configuration step was setting the authentication token for npm publish. While setup-node with registry-url does create an .npmrc file, it still requires the NODE_AUTH_TOKEN environment variable to be set for authentication to work. After this change, there is no mechanism to provide the authentication token to npm, which will cause the publish step to fail with authentication errors. The removed lines should either be replaced with an env section in the publish job that sets NODE_AUTH_TOKEN: ${{ secrets.NPM_PUBLISH_TOKEN }}, or the explicit token configuration should be restored.

      - uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
        with:
          node-version: "22.x"
          registry-url: 'https://registry.npmjs.org'
      - name: Publish npm packages
        run: |
          npm publish ./npm/datadog-serverless-compat-linux-x64 --provenance --access public
          npm publish ./npm/datadog-serverless-compat-linux-arm64 --provenance --access public
          npm publish ./npm/datadog-serverless-compat-win32-x64 --provenance --access public
          npm publish ./npm/datadog-serverless-compat-win32-ia32 --provenance --access public
          npm publish ./npm/datadog-serverless-compat-darwin-arm64 --provenance --access public