DynamicTablesPkg: Add StaToken to ProcHierarch CmObj

Add a new StaToken field to CM_ARCH_COMMON_PROC_HIERARCHY_INFO
CmObj, allowing to describe the ASL "_STA" value the processor
or processor container should return.

CM_X64_LOCAL_APIC_X2APIC_INFO.StaToken already allows to reference
a StaToken from a X2APIC CmObj. If ProcHierarchy objects are used,
the SSDT CPU topology table will be generated using the X2APIC
objects, so the new field should not collide with the new one.
Add a note to CM_X64_LOCAL_APIC_X2APIC_INFO.StaToken
to handle this case.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>