[CI] Build Windows and Linux images in parallel

[wenyingd]

Describe the problem/challenge you have

With the change introduced by this PR , Windows images is built on Linux VM using docker buildx. Now the Windows jenkins jobs build Linux and Windows images in serial, which may make the total test time longer then before.

Shall we build the Windows and Linux images in parallel to reduce the test time? Even more, we shall also think about running other commands via SSH connections on each Node in parallel.

Describe the solution you'd like

Anything else you would like to add?