trivial: Only allow verify-update for plugins that support _CAN_VERIFY
trivial: Only allow verify-update for plugins that support _CAN_VERIFY

If the user explicitly specifies the device-id then we do not do the front-end
filtering. If the device detaches without being able to attach then the hardware
could be left in the bootloader state.

See https://github.com/fwupd/fwupd/issues/2926#issuecomment-784234180

hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd