Update Linux Multi GPU TensorRT pipeline to TensorRT 8.4 (#11923)
* Try manually installing trt8.4 in multi-gpu pipeline
* Remove stmts that clean up cmake, ctest. Update tensorrt repository name passed to get_docker_image.py
* Update trt and cudnn home
* Don't install trtexec cli tool.
* Increase job timeout
* Revert timeout change and use trt placeholder builder build option