Implement retries with exponential backoff consistently in Tasks that hold file handles

bin/ obj/ clashes are frequent build definition mistake.
We have an analyzer for it https://github.com/dotnet/msbuild/blob/main/documentation/specs/BuildCheck/Codes.md?rgh-link-date=2026-05-21T14%3A57%3A03.000Z#bc0101---shared-output-path

In `-mt` builds these errors might be uncovered more frequently due to scheduling with less overhead so critical sections in parallel builds operating on the same files overlap more.

- [ ] do it in all msbuild tasks
- [ ] do it in all sdk tasks
- [ ] document that external task authors should do it