update Kubernetes solution flist

[hossnys]

Which package/s are you suggesting this feature for?

Kubernetes

Is your feature request related to a problem? Please describe

• according to this issue https://github.com/threefoldtech/tf-images/issues/292 a new image for k3s was requested with the new tag not using latest tag.

Describe the solution you'd like

• update your used Kubernetes flist to be using this one : https://hub.grid.tf/tf-official-apps/threefolddev-k3s-v1.31.0.flist.md

[AhmedHanafy725]

Requires: #3320

[0oM4R]

update the flist link in k8s in gridclient

[khaledyoussef24]

verified on devnet

Version fccc6af for both worker and master

[khaledyoussef24]

I faced this but can not produce it again