Turbopack: pass RcStr to AnalyzeIssue (#99166)
These were only ever `StyledString::Text` anyway. So just store the
RcStr directly
Simplify the code to fix these lint errors
```
➜ next.js-other git:(canary) ✗ pnpm sg scan
error[no-map-async-cell]: Using `.map(async |...| { ...cell() })` causes non-deterministic cell order
┌─ turbopack/crates/turbopack-core/src/module_graph/mod.rs:766:33
│
722 │ ╭ modules
723 │ │ .iter()
724 │ │ .map(async |m| {
│ │ ╭──────────────────────'
· │ │
766 │ │ │ Vc::cell(rcstr!("Module graph is missing an entry point")),
│ │ │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
· │ │
798 │ │ │ })
│ ╰─│──────────────────'
│ ╰─────────────────'
│
= You probably want to first try_join() the async computations before wrapping them in a cell.
error[no-map-async-cell]: Using `.map(async |...| { ...cell() })` causes non-deterministic cell order
┌─ turbopack/crates/turbopack-core/src/module_graph/mod.rs:767:33
│
722 │ ╭ modules
723 │ │ .iter()
724 │ │ .map(async |m| {
│ │ ╭──────────────────────'
· │ │
767 │ ╭ │ │ StyledString::Text(rcstr!(
· │ │ │
771 │ │ │ │ .cell(),
│ ╰─│─│───────────────────────────────────────^
· │ │
798 │ │ │ })
│ ╰─│──────────────────'
│ ╰─────────────────'
│
= You probably want to first try_join() the async computations before wrapping them in a cell.
Error: 2 error(s) found in code.
Help: Scan succeeded and found error level diagnostics in the codebase.
➜ next.js-other git:(canary) ✗
```
