Run GPU test job after all CPU test jobs succeed. (#14833)
### Description
Make GPU job depends on all CPU jobs
### Motivation and Context
GPU resources are very limited in packaging pipeline.
And GPU test job is very time consuming.
Only one CPU job fails, the workflow fails, so the GPU job is
meaningless.
To utilize GPU resources more efficiently, run GPU job only after all
CPU jobs succeed.
###test pipeline
https://dev.azure.com/aiinfra/Lotus/_build/results?buildId=280905&view=results
