Deprecate Weave CNI plugin

[gaktive]

Internal reference: SURE-6793

It was agreed to deprecate Weave in RKE 1.27 for different reasons:
1 - Weave has not released a new version since Jan 2021
2 - Weave is not supported in rke2/k3s, i.e. no migration path
3 - Apparently, no one is really using weave CNI plugin

Deprecating Weave in RKE 1.27 will mean adding a warning in the logs and in the flags that states "Weave is deprecated and will be removed in 1.30".

@manuelbuil will take care of showing the warning message in the code of rke but he needs that message to be included in the UI too, i.e. when a rke downstream user is creating the cluster, when selecting Weave, it should see the deprecation warning.

[richard-cox]

plugins are handled as helm charts listed per kube version in the responses to v1-rke2-release/releases and v1-k3s-release/releases

[nwmac]

@gaktive This is RKE1, so Ember, right? I only see Weave as an option for RKE1.

[markusewalker]

QA TEST PLAN

Scenarios

Scenario	Test Case
1	As a standard user, provision an RKE1 downstream node driver v1.27 cluster w/Weave CNI, validate that a banner appears
2	As a standard user, provision an RKE1 downstream node driver v1.26 cluster w/Weave CNI, validate that no banner appears

[markusewalker]

Validated that this is addressed in v2.8-head rancher/rancher@595b76a.

ENVIRONMENT DETAILS

• Rancher install: Docker
• Rancher version: v2.8-head rancher/rancher@595b76a

TEST RESULT

Scenario	Test Case	Result
1	As a standard user, provision an RKE1 downstream node driver v1.27 cluster w/Weave CNI, validate that a banner appears	✅
2	As a standard user, provision an RKE1 downstream node driver v1.26 cluster w/Weave CNI, validate that no banner appears	✅

VALIDATION STEPS

Scenario 1

1. As a standard user, provisioned a downstream RKE1 v1.27.5-rancher1-1 with Weave as the CNI.
   • Noted the following warning message:

2. Validated that the cluster and nodes successfully came up as `Active` in Cluster Management and Cluster Explorer.

---

Scenario 2

1. Repeated scenario, but provisioned a downstream RKE1 v1.26.8-rancher1-1 with Weave as the CNI.

[manuelbuil]

Awesome! rke code also includes now the warning!

[nwmac]

@manuelbuil Does that have an automated test, or has that been manually QA-ed?

[manuelbuil]

@manuelbuil Does that have an automated test, or has that been manually QA-ed?

Automated test sounds like too much for a log entry. I manually tested it and hopefully QA will do it as well. The QA procedure for rke1 is still in the works

[mantis-toboggan-md]

/backport v.2.7.next1