Add gosec to kubeops

[antgamdia]

Description of the change

After reporting #4810 , I've added the linter just in the kubeops code .
The building is gonna fail now, but if we start fixing the issues, we will be, eventually, able to merge this PR.

Benefits

Prevent new gosec issues.

Possible drawbacks

N/A

Applicable issues

• related Handle gosec issues #4810

Additional information

N/A

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[castelblanque]

The building is gonna fail now

It seems that CI passed fine. Is it OK like this or should have failed?

[antgamdia]

It seems that CI passed fine. Is it OK like this or should have failed?

Sorry, I copy&pasted the same msg but then I didn't edit it when I added the fixes (example 2c51f51).
In short, it should have failed when I created the PR (and so it happened), but once I added the fixes, it should have passed.