[v2.9] Remove PSP checks from SUC charts and it's upgrade process

[chiukapoor]

Issue

• https://github.com/rancher/rancher/issues/44922

Problem

• PSP is completely removed from k8s 1.29 onwards

TODO

• [ ] Update SUC chart version in dockerfile once the charts PR is merged.

Solution

• Remove PSP checks from SUC charts and it's upgrade process

Engineering Testing

Manual Testing

• Created a rancher server with v2.8.3. Deployed rke2 1.28 k8s downstream cluster.
• Upgraded rancher server to custom image with the PSP checks removed.
• Rancher server and SUC chart upgrade went successful, PSP was removed from the values.yaml of SUC chart.