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Add kubelet stats for windows system container "pods"
**What this PR does / why we need it**:
This PR adds kubelet stats for windows system container "pods". Without this, kubelet will always logs error:
```
kubelet.err.log:4832:E0711 22:12:49.241358 2872 helpers.go:735] eviction manager: failed to construct signal: "allocatableMemory.available" error: system container "pods" not found
```
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#66087
**Special notes for your reviewer**:
/sig windows
/sig node
**Release note**:
```release-note
Add kubelet stats for windows system container "pods"
```
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