Switch npm release workflows to Trusted Publishing with GitHub-hosted runners

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: smurching

.github/workflows/release-ai-sdk-provider.yml

@@ -57,23 +57,6 @@ jobs:
       - name: Check package exports
         run: npm run check-package
 
-      - name: Pack
-        run: npm pack
-
-      - name: Upload tarball artifact
-        uses: actions/upload-artifact@v5
-        with:
-          name: dist-ai-sdk-provider
-          path: integrations/ai-sdk-provider/*.tgz
-
-      - name: Create GitHub Release (draft)
-        if: inputs.production
-        uses: ncipollo/release-action@v1
-        with:
-          artifacts: "integrations/ai-sdk-provider/*.tgz"
-          draft: true
-          generateReleaseNotes: true
-
       - name: Publish to npm
         if: inputs.production
         run: npm publish --access public --provenance --ignore-scripts

.github/workflows/release-langchainjs.yml

@@ -60,23 +60,6 @@ jobs:
       - name: Check package exports
         run: npm run check-package
 
-      - name: Pack
-        run: npm pack
-
-      - name: Upload tarball artifact
-        uses: actions/upload-artifact@v5
-        with:
-          name: dist-langchainjs
-          path: integrations/langchainjs/*.tgz
-
-      - name: Create GitHub Release (draft)
-        if: inputs.production
-        uses: ncipollo/release-action@v1
-        with:
-          artifacts: "integrations/langchainjs/*.tgz"
-          draft: true
-          generateReleaseNotes: true
-
       - name: Publish to npm
         if: inputs.production
         run: npm publish --access public --provenance --ignore-scripts