Use reserved v5p

[zpcore]

Description

1. Use reserved resource for torchbench v5p;
2. Use the new torch_xla wheel path based on fix wheel name pytorch/xla#7883.

Tests

https://60bb71acc6784780b3bbdbae4ffa636f-dot-us-central1.composer.googleusercontent.com/dags/pytorchxla-torchbench/grid

Checklist

Before submitting this PR, please make sure (put X in square brackets):

• I have performed a self-review of my code.
• I have necessary comments in my code, particularly in hard-to-understand areas.
• I have run one-shot tests and provided workload links above if applicable.
• I have made or will make corresponding changes to the doc if needed.