[2.5] Fix simulator result path

[YuanTingHsieh]

Description

Fix simulator result path

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Quick tests passed locally by running ./runtest.sh.
• In-line docstrings updated.
• Documentation updated.

[YuanTingHsieh]

@ZiyueXu77 Do we need to correct the path for BRAT18 and prostate as well?

[ZiyueXu77]

@ZiyueXu77 Do we need to correct the path for BRAT18 and prostate as well?

For brats, I don't think so since we directly use the root folder "tensorboard --logdir='./workspace_brats'"
But for prostate, we may need to update the path in https://github.com/NVIDIA/NVFlare/blob/main/examples/advanced/prostate/result_stat/plot_tensorboard_events.py (although we used blob to search for the record)

[YuanTingHsieh]

/build

[ZiyueXu77]

looks good