[Fix] use cmdline in Final Jar Testing Stage for new managed Windows Image (#21130)
### Description
No bash command in Managed Windows image.
Use CmdlLine step instead.
### Verified Link
https://dev.azure.com/aiinfra/Lotus/_build/results?buildId=491902&view=logs&j=f1f8e11e-a9fa-53e5-cd29-3ba2c1988550