feat(turbopack): Introduce `RcStr` (#66262)
# Turbopack
* https://github.com/vercel/turbo/pull/8272 <!-- Donny/강동윤 - feat:
Update `swc_core` to `v0.92.8` -->
* https://github.com/vercel/turbo/pull/8262 <!-- Alexander Lyon - add
crate to calculate prehashes -->
* https://github.com/vercel/turbo/pull/8174 <!-- Tobias Koppers - use
prehash to avoid rehashing the key in the task cache -->
* https://github.com/vercel/turbo/pull/7674 <!-- Alexander Lyon - [turbo
trace] add ability to filter by value and occurences -->
* https://github.com/vercel/turbo/pull/8287 <!-- Donny/강동윤 - feat:
Update `swc_core` to `v0.92.10` -->
* https://github.com/vercel/turbo/pull/8037 <!-- Alexander Lyon - create
turbo-static for compile time graph analysis -->
* https://github.com/vercel/turbo/pull/8293 <!-- Will Binns-Smith - Sync
Cargo.lock with Next.js -->
* https://github.com/vercel/turbo/pull/8239 <!-- Benjamin Woodruff -
Reduce amount of code generated by ValueDebugFormat -->
* https://github.com/vercel/turbo/pull/8304 <!-- Benjamin Woodruff -
Minor optimizations to the codegen of TaskFnInputFunction -->
* https://github.com/vercel/turbo/pull/8221 <!-- Donny/강동윤 - perf:
Introduce `RcStr` -->
### What?
I tried using `Arc<String>` in
https://github.com/vercel/turbo/pull/7772, but a team member suggested
creating a new type so we can replace underlying implementation easily
in the future.
### Why?
To reduce memory usage.
### How?
Closes PACK-2776
