Turbopack: filter NftJsonAsset entries earlier (#81446)
Improves invalidation (and performance)
1. filter out client asset while discovering client assets, so this filters out the whole subgraph already
2. apply the user-defined excludes while discovering the assets, this is also what the JS implementation does:
https://github.com/vercel/next.js/blob/b77eb3e127986b47cab9eced2253f00de12a5a14/packages/next/src/build/collect-build-traces.ts#L336-L343
Closes PACK-5037
