fix: revert "chore: fix corepack wiring in integration tests" (#10054)
Reverts vercel/turborepo#10044
This seems to be causing failures
https://github.com/vercel/turborepo/actions/runs/13571078355/job/37935992392?pr=9995#step:9:1167
Failures seem to be flakey:
[attempt
1](https://github.com/vercel/turborepo/actions/runs/13570184039/attempts/1)
[attempt
2](https://github.com/vercel/turborepo/actions/runs/13570184039/attempts/2)