Enable Go modernizer slicescontains

Daniel Keenanrequested to merge
enable-modernizer-slicescontains into main

What does this MR do?

Enables the Go modernizer slicescontains and fixes existing issues flagged by it.

Why was this MR needed?

To improve and enforce Go code quality standards.

What's the best way to test this MR?

Run make lint

What are the relevant issue numbers?

N/A

Edited by Daniel Keenan

Merge request reports