onnxruntime

[EP Perf] Update env to ubuntu 22.04 (#23570)

### Description
<!-- Describe your changes. -->
* Update env to cuda 12.6/ubuntu 22.04 (ubuntu 20.04 uses outdated py38
by default)
* Clean old trt8.6 test config


### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->