feat: Switch from Redoc to Stoplight Elements for API documentation (#30591)

.github/workflows/api.yml

@@ -28,8 +28,3 @@ jobs:
 
       - name: Run build
         run: make build
-
-      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
-        with:
-          name: mattermost-api-reference
-          path: api/v4/html