Automatic merge from submit-queue (batch tested with PRs 47738, 49196, 48907, 48533, 48822)

Fix TODO: rename podInfraContainerID to sandboxID

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

Code-cleanup in kubelet to use consistent naming for sandbox ID. Not super urgent, but thought it would be nice to knock off some TODOs. 

**Which issue this PR fixes**

Fixes a TODO in the code, no associated issue.

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```