SPECS: python-torch add ROCm backend

[Sakura286]

Summary

• Enable ROCm backend
• Upgrade PyTorch to 2.13.0

Notice

1. This PR relies on SPECS: add PyTorch ROCm backend requirements #965 and SPECS: llvm-defaults: fix libomp soft-link path #967
2. This package need additional _multibuild file to build rocm backened.

<multibuild>
  <package>rocm</package>
</multibuild>

3. This package build about 2000 C++/HIP target, it is suggested to add _constraints to build with more parallelism

<constraints>
  <overwrite>
    <conditions>
      <arch>riscv64</arch>
     </conditions>
    <hardware>
       <jobs>32</jobs>
    </hardware>
  </overwrite>
  
  <overwrite>
    <conditions>
      <arch>x86_64</arch>
     </conditions>
    <hardware>
       <jobs>32</jobs>
    </hardware>
  </overwrite>
</constraints>

Build Status

https://build.openruyi.cn/package/show/home:Sakura286:ROCm_PyTorch_Submit/python-torch

Checklist

• I have read the openRuyi Code of Conduct and agree to abide by it.
• I have read the AI-Assisted Contribution Policy, and this Pull Request includes non-trivial AI-assisted content.

Assisted-by: GPT 5.5/5.6, Kimi K3

Assisted Content:

• pytorch-smoke-test.py test script
• Some HIP compilation error like 2007-loss-hip-O0-workaround-llvm22-codegen.patch, but guarded by external links with human audit.
• Some Comments