New images can be pushed without k3s binaries

[rancher-max]

Ref: https://drone-publish.rancher.io/rancher/system-agent-installer-k3s/84/1/2

+ curl -fL -O -R https://github.com/k3s-io/k3s/releases/download/v1.23.7%2Bk3s1/k3s

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed


  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

curl: (22) The requested URL returned error: 404

The k3s binaries did not exist yet, so this failed to pull them. However, it still created and pushed the images. This causes failures downstream when trying to create a cluster in rancher as the images do not have the k3s binary in them.

[rancher-max]

system-agent-installer-rke2 should also be checked when this is fixed as it likely has the same build code.