lxd: update to 2.21.
lxd: update to 2.21.

Closes: #10218 [via git-merge-pr]

floGik/void-packages,necrophcodr/void-packages,floGik/void-packages,floGik/void-packages,coredumb/void-packages,coredumb/void-packages,NeoChontrix/void-packages,floGik/void-packages,coredumb/void-packages,floGik/void-packages,floGik/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,coredumb/void-packages,coredumb/void-packages,necrophcodr/void-packages,coredumb/void-packages