Add CPU Manager related configs (backport #756)

[mergify]

Problem:
This is a prerequisite pr for implementing CPU Pinning. We need to add the cpu manager configs first. system-reserved, kube-reserved, cpu-manager-policy.

Solution:
Introduced two configs files:

• rke2-99-z00-harvester-reserved-resources.yaml
  • include two configssystem-reserved and kube-reserved, both of which follow GKE CPU reservation formula for calculating reserved CPU resources.
• rke2-99-z01-harvester-cpu-manager.yaml
  • include cpu manager policy setting, currently the value is "none" (which is the default value)

Note

Here I add these files instead of adding configs in 90-harvester-server.yaml or 90-harvester-worker.yaml since we will have 99-max-pods.yaml (after upgrade to a newer harvester version) which overrides kubelet args to "max-pods=200".
https://github.com/harvester/harvester/blob/226f72aa58532071232ad548e27970c1cec55733/package/upgrade/upgrade_node.sh#L490-L495

Related Issue:
related to harvester/harvester#2305
HEP: harvester/harvester#5803

Test Plan:
Setup harvester with one node which has 8 CPUs and check if the two config files exist under /etc/rancher/rke2/config.yaml.d/ and have correct settings.
in 99-z00-harvester-reserved-resources.yaml. The content should be

kubelet-arg+:
- "system-reserved=cpu=490m"
- "kube-reserved=cpu=490m"

in 99-z01-harvester-cpu-manager.yaml. The content should be

kubelet-arg+:
- "cpu-manager-policy=none"

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This is an automatic backport of pull request #756 done by [Mergify](https://mergify.com).