Automatic merge from submit-queue (batch tested with PRs 53190, 54790, 54445, 52607, 54801). 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>.

Update `truncateBody` to not truncate with high level

And add a unit-tests to verify that it works properly.

**What this PR does / why we need it**:
Update `truncateBody` so that one can use `V(10)` to read the entire content of a HTTP response.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:
```release-note
NONE
```