Turbopack: fixup cache handler tracing (#94477)
https://github.com/vercel/next.js/pull/94197 had a bug in the Turbopack
case, where it didn't properly trace all necessary files referenced from
`cacheHandler` and `cacheHandlers`.
If you imported `lodash` in the cache handler, then
- `node_modules/.pnpm/lodash@4.18.1/node_modules/lodash/lodash.js` was
correctly traced
but missing were
- `node_modules/.pnpm/lodash@4.18.1/node_modules/lodash/package.json`
and
- `node_modules/lodash` (the symlink)
The problem was that it wasn't including affecting sources of these
entrypoints, because it was treating those entrypoints as bundled:
```
SingleModuleGraph::new_inner(
entries: Vec<ChunkGroupEntry>,
visited_modules: &FxIndexMap<ResolvedVc<Box<dyn Module>>, GraphNodeIndex>,
include_traced: bool,
include_binding_usage: bool,
entries_are_traced: bool, // <------ problematic
) -> Result<Vc<Self>>
```
should really have been
```
SingleModuleGraph::new_inner(
entries: &GraphEntries, // contains Vec<ChunkGroupEntry> and traced_modules: Vec<Modules
visited_modules: &FxIndexMap<ResolvedVc<Box<dyn Module>>, GraphNodeIndex>,
include_traced: bool,
include_binding_usage: bool,
) -> Result<Vc<Self>> {
```
because the single `entries_are_traced: bool` can be different per
entry.
