Automatic merge from submit-queue (batch tested with PRs 43373, 41780, 44141, 43914, 44180)
kubelet: make dockershim.sock configurable
**What this PR does / why we need it**: allow the path to dockershim.sock to be configurable, so downstream projects such as OpenShift can run integration tests without needing to run them as root
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*:
**Special notes for your reviewer**:
**Release note**:
```release-note
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cc @derekwaynecarr @sttts @kubernetes/rh-cluster-infra @kubernetes/sig-node-pr-reviews
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