feat!: Drop nitro-utils package (#14998)

It is not used anymore, as we inlined the respective code into
nuxt/solidstart packages for now. We can always bring it back later if
needed.

Author: mydea

package.json

@@ -68,7 +68,6 @@
     "packages/integration-shims",
     "packages/nestjs",
     "packages/nextjs",
-    "packages/nitro-utils",
     "packages/node",
     "packages/nuxt",
     "packages/opentelemetry",