multi-tenant cannot detect pid for monitor.script

[yangw-dev]

inductor-A100-perf-nightly and h100
utilize cgroups in order to isolate performance, they also run as specific users.

This is the main code: https://github.com/pytorch-labs/pytorch-gha-infra/tree/main/multi-tenant

https://github.com/pytorch/pytorch/blob/977abe786d907c1ff76528a550e3d53c9f3b1044/.github/workflows/_linux-test.yml#L177

some h100 and a100 tests seem run with cgourp does not expose themselves to host for pid names and infos,

potentially run the monitor in test.sh