Problem: Manually tainted nodes will not get new cattle-node-agent pods due to insufficient tolerations.
Solution: Allow all taints for cattle-node-agent. This change also prefers controlplane and etcd nodes for cattle-cluster-agent.

PRs included
rancher/ui#3113
rancher/ui#3114

This reverts commit d8d49892.

Problem:
got cluster not ready error when upgrade rancher server

Solution:
check cluster ready before upgrade system service

This reverts commit cd5ec7e6.

Problem:
Rancher 2.2.4 and 2.2.5 use monitoring chart 0.0.3, version check will
prevent app upgrade when version not change but we still want to update
the app

Solution:
Remove version check when upgrade alertmanager

Issue:
https://github.com/rancher/rancher/issues/21113

Problem:
System chart have bug that enable alertmanager will also deploy operator if not set false to enable operator

Solution:
Set enable operator to false, system charts bug will be fixed later

Issue:
https://github.com/rancher/rancher/issues/20975