Automatic merge from submit-queue (batch tested with PRs 56040, 62627). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Node-level Checkpointing manager: Migrate dockershim and device plugin manager checkpointing  

**What this PR does / why we need it**:
This PR abstracts checkpoint manager at kubelet level. Currently,  `dockershim`, `deviceplugin` have their own native checkpointing primitives. And most recently `cpumanager` also added package native checkpointing primitives. This adds to the redundancy at implementation level. Also degrades code readability and consistency.

To help this:

1.  Checkpointing interface is being abstracted at kubelet level as `checkpointmanager` package.
2.  `dockershim` and `deviceplugin` packages are modified to use `checkpointmanager` instead native checkpointing.

**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 #



```release-note
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cc @jeremyeder @vishh @derekwaynecarr @sjenning @yujuhong @dchen1107 @RenaudWasTaken @ConnorDoyle @RenaudWasTaken @jiayingz @mindprince @timstclair 
/sig node