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Fix cgroup names in node_container_manager_test.

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

Fix cgroup names in node_container_manager_test.

The names were made invalid for the CgroupName refactor in #62541, so update them here.

Furthermore, as the new names are now compatible with what EnforceNodeAllocatable wants, reuse the constants there as well.

Tested:
```
  $ make test-e2e-node REMOTE=true HOSTS=test-cos-beta-67-10575-27-0 FOCUS='Validate Node Allocatable' SKIP='' TEST_ARGS='--feature-gates=DynamicKubeletConfig=true'
  • [SLOW TEST:39.488 seconds]
  [k8s.io] Node Container Manager [Serial]
    Validate Node Allocatable
      set's up the node and runs the test
  Ran 1 of 261 Specs in 57.348 seconds
  SUCCESS! -- 1 Passed | 0 Failed | 0 Pending | 260 Skipped
```




**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 #63549

**Special notes for your reviewer**:
/assign @dashpole 

**Release note**:

```release-note
NONE
```