…xplicitly default the field value if it is not set

Signed-off-by: Misha Sakhnov <[email protected]>

…nd mark vmSpec.Guest.CPUs.Min as online during the boot

Signed-off-by: Misha Sakhnov <[email protected]>

Signed-off-by: Misha Sakhnov <[email protected]>

introduce separate CPU scaling flow based on the vmSpec.cpuScalingMode

If vmSpec.cpuScalingMode is equal to `qmp_scaling` the logic of the
scaling is preserved as before:

- Scale, if required the amount of CPUs using qmp commands.
- If it is required to scale cgroups, call vm-runner /cpu_change endpoint

if vmSpec.cpuScalingMode is equal to `cpuSysfsStateScaling` all cpu
scaling requests go directly to the vm-runner /cpu_change, which in
that configuration goes to the neonvm-daemon to reconcile required
amount of online CPUs.

Value `cpuSysfsStateScaling` also modifies the qemu and the kernel
arguments to enable plug all CPUs but mark as online only first one.

Signed-off-by: Misha Sakhnov <[email protected]>

pass cpuScalingMode as argument to the vm-runner
rename arguments, constants and functions here and there
drop unused code
move default cpu scaling mode to controller argument

Signed-off-by: Misha Sakhnov <[email protected]>

Co-authored-by: Oleg Vasilev <[email protected]>

Signed-off-by: Misha Sakhnov <[email protected]>

Signed-off-by: Misha Sakhnov <[email protected]>