github: make windows build use all available cores

[poweifeng]

- Also used a smaller runner as the gains from the 32-core was
  not efficient when comparing output times.
- Clean-up:
    - Rename the android continuous to a proper name
    - set 'echo on' for the Windows release build so we'll know
      why the output asset does not get "moved" correclty.

[poweifeng]

ready for review