hv: sched: decouple scheduler from schedule framework

This patch decouple some scheduling logic and abstract into a scheduler.
Then we have scheduler, schedule framework. From modulization
perspective, schedule framework provides some APIs for other layers to
use, also interact with scheduler through scheduler interaces.

Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/include/arch/x86/guest/vcpu.h

@@ -634,7 +634,7 @@ void resume_vcpu(struct acrn_vcpu *vcpu);
  *
  * @return None
  */
-void schedule_vcpu(struct acrn_vcpu *vcpu);
+void launch_vcpu(struct acrn_vcpu *vcpu);
 
 /**
  * @brief create a vcpu for the vm and mapped to the pcpu.

hypervisor/include/arch/x86/per_cpu.h

@@ -37,6 +37,7 @@ struct per_cpu_region {
 #endif
 	struct per_cpu_timers cpu_timers;
 	struct sched_control sched_ctl;
+	struct sched_noop_control sched_noop_ctl;
 	struct thread_object idle;
 	struct host_gdt gdt;
 	struct tss_64 tss;