Add Terraform docs for v3.1.1 patch release

[a-blender]

Issue: #1186

#1097
#1112
#1199

Problem

Solution

Add TF docs for

• Agent customization fields + config examples
• PSACT support: default_pod_security_admission_configuration_template_name RKE docs + config example with tf reconciliation error workaround
• RKE auth config entity_id_field
• Other minor updates

Testing

Engineering Testing

Manual Testing

Automated Testing

QA Testing Considerations

Regressions Considerations

[HarrisonWAffel]

A couple of small nits and a question, generally lgtm

[felipe-colussi]

I have no idea how to refer to an unchanged line.

Reading the cluster.md "description" I didn't notice that it was specific for rke, I just saw that on line 23.

The cluster_v2.md have on the description that it can be used to create RKE2 and K3S Clusters.

I think that would be nice to add on the description of the rancher2_cluster Resource that it is used to create a rke cluster.

[a-blender]

@felipe-colussi The rancher2_cluster is only for rke clusters in Rancher so there's no need to explicitly say that, vs the v2 case where mentioning that it's also supported for k3s clusters is needed.

[HarrisonWAffel]

lgtm, dont forget to squash on merge