layers/poky: Update to warrior-21.0.0
layers/poky: Update to warrior-21.0.0

Changelog-entry: Update to Poky warrior-21.0.0
Signed-off-by: Florin Sarbu <3a837a37a2ac9072a088641ec330e0e5d5b86f4e@balena.io>

resin-os/resin-raspberrypi,resin-os/resin-raspberrypi