Preallocation still done by default for correct max usage estimates, but
in development environment it could be beneficial not to use up that
space, so I added a flag to disable preallocation
Signed-off-by: Dmitry Sharshakov <d3dx12.xx@gmail.com>
Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>