Turbopack: improve references benchmark (#84223)
This isn't ideal, but the setup is somewhat negligible
```
Benchmarking references/react-dom-client.development.js/full: Warming up for 1.0000 s
Backend: 1.132083ms Setup: 1.93475ms, Analysis: 96.47525ms
Backend: 1.328792ms Setup: 179.875µs, Analysis: 150.265291ms
Backend: 1.352333ms Setup: 95.375µs, Analysis: 80.448791ms
Backend: 967.916µs Setup: 77.083µs, Analysis: 78.769917ms
Backend: 685.166µs Setup: 66.458µs, Analysis: 76.768042ms
Backend: 718.834µs Setup: 70.292µs, Analysis: 75.807458ms
Backend: 825.125µs Setup: 68.625µs, Analysis: 78.019792ms
Backend: 903.209µs Setup: 68.709µs, Analysis: 78.0815ms
Backend: 1.026958ms Setup: 79.959µs, Analysis: 103.203291ms
Backend: 707.208µs Setup: 64.917µs, Analysis: 79.350292ms
Backend: 1.018291ms Setup: 82µs, Analysis: 79.496292ms
Backend: 832.375µs Setup: 64.875µs, Analysis: 75.658958ms
Backend: 795.833µs Setup: 60.333µs, Analysis: 75.704792ms
Backend: 948.417µs Setup: 68.416µs, Analysis: 75.474584ms
Backend: 725.167µs Setup: 65.542µs, Analysis: 75.63275ms
```
and this certainly makes the benchmark more accurate, as it now always recomputes all tasks on every call.
