697e541a8 Add scripts that prepares our windows VM image (flutter/engine#8446) (#30538)

https://github.com/flutter/engine/compare/8b74cba20bb8...697e541a8d94

git log 8b74cba20bb878d1e75747200f75dfaff5925bda..697e541a8d9475b504a2bd6f335b4f004775adf3 --no-merges --oneline
697e541a8 Add scripts that prepares our windows VM image (flutter/engine#8446)

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