reenable back thor test

[lanluo-nvidia]

Description

Two changes:

1. thor non_zero is fixed in trt 14, reenable back the converter and tests
2. save engine to /tmp/trt.ep has side effect when run the tests in parallel in dlfw
   change to the unique tmp dir so that test run in parallel won't mixed up
   Fixes # (issue)

Type of change

Please delete options that are not relevant and/or add your own.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas and hacks
• I have made corresponding changes to the documentation
• I have added tests to verify my fix or my feature
• New and existing unit tests pass locally with my changes
• I have added the relevant labels to my PR in so that relevant reviewers are notified