reland "support running test_mobile_profiler with buck1/buck2 and OSS (#89001)" (#89091)
We modify this to no longer use std::experimental::filesystem::path
and use our own custom type instead.
This reverts commit c53a5ac6cca7e2e7d7c47b1a816c7eaa2e7a7704.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89091
Approved by: https://github.com/r-barnes, https://github.com/malfet
