Add sleep time after tests are run (#2717)
Add sleep time after tests are run (#2717)

*Add sleep after tests are run on AMD backend nodes
* Disable Unit_hipPtrGetAttribute_Simple test for now
ROCm-Developer-Tools/HIP,ROCm-Developer-Tools/HIP,ROCm-Developer-Tools/HIP,ROCm-Developer-Tools/HIP,ROCm-Developer-Tools/HIP