internal: introduce macro helpers to check flag requirements
internal: introduce macro helpers to check flag requirements

Similar to VIR_EXLUSIVE_FLAGS, it will error out if flag requirement is
not met.

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

eskultety/libvirt,zippy2/libvirt,zippy2/libvirt,fabianfreyer/libvirt,libvirt/libvirt,agx/libvirt,olafhering/libvirt,rlaager/libvirt,crobinso/libvirt,fabianfreyer/libvirt,taget/libvirt,crobinso/libvirt,jardasgit/libvirt,nertpinx/libvirt,eskultety/libvirt,datto/libvirt,rlaager/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,olafhering/libvirt,taget/libvirt,rlaager/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,rlaager/libvirt,nertpinx/libvirt,agx/libvirt,crobinso/libvirt,taget/libvirt,jardasgit/libvirt,libvirt/libvirt,olafhering/libvirt,agx/libvirt,jfehlig/libvirt,zippy2/libvirt,olafhering/libvirt,nertpinx/libvirt,libvirt/libvirt,eskultety/libvirt,zippy2/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,agx/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,nertpinx/libvirt,eskultety/libvirt,datto/libvirt,taget/libvirt,rlaager/libvirt,jardasgit/libvirt,eskultety/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,libvirt/libvirt,andreabolognani/libvirt,jfehlig/libvirt,datto/libvirt,agx/libvirt,crobinso/libvirt,datto/libvirt,datto/libvirt,andreabolognani/libvirt,taget/libvirt