[backport 2.8.x] agent-tls-mode global setting missing from ui

[brudnak]

Setup

Component	Version / Type
Rancher version starting	v2.8-1dceeccd0eb996fcf8ab66282b00d0ec798bacaf-head
Installation option	Helm (high availability)
RKE binary version used	v1.5.10
If Helm Chart k8s cluster	v1.28.10
Downstream cluster type	Linode k3s
Downstream K8s version	1.28.11+k3s2
Authentication providers enabled	local
Logged in user role	admin
Browser type	Firefox Developer Edition
Browser version	129.0b5 (64-bit)
Dashboard	master 102f1e6
Webhook version	rancher/rancher-webhook:v0.4.8-rc5

Describe the bug

The agent-tls-mode setting is missing from the Global Settings section in the UI

To Reproduce

1. Start rancher on v2.8-head

2. Set a value for the agent-tls-mode setting during the helm install process, e.g.,

   helm install rancher rancher-alpha/rancher --devel \
     --namespace cattle-system \
     --set hostname=$URL_REDACTED \
     --set ingress.tls.source=letsEncrypt \
     --set letsEncrypt.email=$EMAIL_REDACTED \
     --set letsEncrypt.ingress.class=nginx \
     --set bootstrapPassword=$PW_REDACTED \
     --set rancherImage=rancher/rancher \
     --set rancherImageTag=v2.8-head \
     --version 2.8.6-alpha3 \
     --set global.cattle.psp.enabled=false \
     --set agentTLSMode=system-store \
     --set privateCA=true

3. When logging into Rancher navigate to Global Settings

4. See there is no agent-tls-mode setting listed

5. It is however listed, and settable using kubectl

Result

The setting was available in the UI

Expected Result

For the setting to be listed in the UI

Bug Frequency

Frequency	Selected Option
Consistent (10/10) - A consistent bug can be replicated every time the test is executed.	❎
Frequent (7/10)- A frequent bug can be replicated like 7 out of 10 times when a test is replicated
Occasional (5/10) - Occasional bug is more hard to replicate than a frequent bug.
Once thus far, twice thus far - Few bugs cannot be reproduced every time you run the test.

[richard-cox]

Updated issues type and linking original issue https://github.com/rancher/dashboard/issues/11138 (SURE-7641).

UI changes were schedule for 2.9.0 or, depending on time, 2.10.0. We got 2.9.0 in however backporting was not mentioned and has now missed the 2.8.next1 boat, moving to next2

[gaktive]

next2 is now next1 so hopefully this is a quick one to work on.

[IsaSih]

Tests pass on v2.8-68e5d43e449fcd3ef73baf1caee98da6f0104eed-head. Also, payload is successfully changing the agent-tls-mode.