chore(testing): Flock lock for playwright tests; Pin node version for OHIF; add more workers (#6099)

* update Cypress apt deps for Ubuntu Noble (drop libgconf-2-4, libasound2→libasound2t64)

netlify.toml

@@ -15,7 +15,7 @@
 [build.environment]
   # If 'production', `pnpm install` does not install devDependencies
   NODE_ENV = "development"
-  NODE_VERSION = "24"
+  NODE_VERSION = "24.15.0"
 
 [[headers]]
   for = "/*"