chore: update turbopack (#60980)
### Turbopack Updates
* https://github.com/vercel/turbo/pull/6923 <!-- Tobias Koppers - Bottom
up tracing and some tracing improvements -->
* https://github.com/vercel/turbo/pull/7028 <!-- Leah - fix: add missing
layer ident modifier to asset with inner assets -->
Closes PACK-2270
