Automatic merge from submit-queue (batch tested with PRs 50378, 51463, 50006, 51962, 51673). 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>..

Improved Italian translation for kubectl

**What this PR does / why we need it:**
This PR provides an improved Italian translation of kubectl (related to #50155).

**Which issue this PR fixes** _(`optional, in fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)_: fixes #
No issues

**Special notes for your reviewer:**
This PR requires Italian people to assist in the review. I'm native in Italian with BS in Computer Science.

```release-note
Improved Italian translation for kubectl
```