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Add stub device plugin for conformance e2e test

**What this PR does / why we need it**:

Add stub device plugin for conformance e2e test
- extend [device_plugin_stub](https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/cm/deviceplugin/device_plugin_stub.go) to support e2e test
- add test suite with this device-plugin-stub
- simulate more use cases by deploying some pods to request these resources

**Which issue this PR fixes**:

fixes #52861

**Special notes for your reviewer**:

@vishh @jiayingz PTAL.

**Release note**:

```release-note
None
```