Add GHCR image publishing to K3s release #2922

Job	Run time
Build Go Tests (amd64)	1m 40s
build-arm64 / Build	6m 1s
Build Go Tests (arm64)	2m 46s
build / Build	7m 25s
E2E Tests (btrfs)	4m 39s
E2E Tests (embeddedmirror)	6m 9s
E2E Tests (privateregistry)	5m 57s
E2E Tests (wasm)	4m 54s
E2E Tests (startup)	16m 24s
E2E Tests (rootless)	6m 15s
E2E Tests (externalip)	6m 5s
E2E Tests (s3)	7m 59s
Docker (autoimport, amd64)	2m 38s
Docker (cacerts, amd64)	57s
Docker (etcd, amd64)	2m 18s
Docker (basics, amd64)	1m 6s
Docker (bootstraptoken, amd64)	58s
Docker (bootstraptoken, arm64)	1m 45s
Docker (cacerts, arm64)	1m 31s
Docker (basics, arm64)	2m 3s
Docker (skew, arm64)	3m 16s
Docker (hardened, arm64)	2m 31s
Docker (lazypull, arm64)	2m 4s
Docker (skew, amd64)	2m 9s
Docker (snapshotrestore, amd64)	5m 49s
Docker (lazypull, amd64)	1m 0s
Docker (secretsencryption, amd64)	10m 3s
Docker (etcd, arm64)	2m 50s
Docker (hardened, amd64)	2m 8s
Docker (token, amd64)	4m 41s
Docker (upgrade, amd64)	1m 9s
Docker (upgrade, arm64)	2m 3s
Docker (token, arm64)	5m 34s
Docker (svcpoliciesandfirewall, amd64)	2m 28s
	2h 17m 15s

Provide feedback