Make Kubelet Configuration customizable

[jiayiwang7]

• [x] Design Review
• [x] Create cluster with custom Kubelet configuration
• [x] Upgrade cluster with custom Kubelet configuration
• [x] Write and Test Docker
• [x] Write and Test vSphere
• [x] Write and Test Cloudstack
• [x] Write and Test Tinkerbell
• [x] Write and Test Nutanix
• [x] Block setting cloud-provider and provider-id fields
• [x] Bottlerocket support - add patch on the CAPI side to introduce all the fields exposed for BR
• [x] e2e test