Update the multi-tenants example to support torch.compile and disable lazy mode

[wangkl2]

Description

📝 Update the multi-tenants example to support torch.compile() and disable the Lazy mode.
📝 Add instructions to create container and set up python env variable to avoid mpirun execution failure.
📝 Refine the instructions to run the example in readme.
📝 Add changelog.

Type of changes

Please specify the type of changes, and delete the options that are not relevant.

• Documentation update
• Bug fix (changes which fix an issue)
• Others (please specify)
  Deprecate lazy mode and use torch.compile as default for the resnet50 multi-tenants training.

Tests

📝 Run the commands in readme file.

Checklist

• I agree with the Developer Certificate of Origin.
• My code conforms to the following coding guidelines:
  • Use Python 3
  • Python code follows PEP 8 Coding Styles
• I have performed a self code review.
• I have made corresponding changes to the documentation.
• I have added tests that prove my fix is effective or that my feature works.