vircgroup: introduce virCgroupV2ValidatePlacement
vircgroup: introduce virCgroupV2ValidatePlacement

Signed-off-by: Pavel Hrdina <d4772d05997b8abf035041e3b4f4996380ea7e7a@redhat.com>

andreabolognani/libvirt,jardasgit/libvirt,eskultety/libvirt,jardasgit/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,zippy2/libvirt,zippy2/libvirt,nertpinx/libvirt,zippy2/libvirt,fabianfreyer/libvirt,zippy2/libvirt,crobinso/libvirt,nertpinx/libvirt,crobinso/libvirt,eskultety/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,jfehlig/libvirt,libvirt/libvirt,jardasgit/libvirt,nertpinx/libvirt,eskultety/libvirt,libvirt/libvirt,libvirt/libvirt,jardasgit/libvirt,olafhering/libvirt,nertpinx/libvirt,andreabolognani/libvirt,jfehlig/libvirt,andreabolognani/libvirt,crobinso/libvirt,olafhering/libvirt,olafhering/libvirt,andreabolognani/libvirt,olafhering/libvirt,fabianfreyer/libvirt,eskultety/libvirt,libvirt/libvirt,jfehlig/libvirt,jardasgit/libvirt,eskultety/libvirt,crobinso/libvirt