ci: use maximize build space for K8s tests

[nikpivkin]

Description

We need to increase the disk space for k8s tests.

Related issues

• Close test: use maximize build space for K8s tests #5383

Checklist

• I've read the guidelines for contributing to this repository.
• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[knqyf263]

@nikpivkin Do you know what consumes the disk space in K8s tests? Other tests make sense as they pull container/VM images for testing. AFAIK, K8s tests don't pull testing artifacts. I just want to figure out what is causing this problem.

[knqyf263]

I'm unsure why k8s tests are consuming storage so much, but it is good to have more storage, regardless.
@nikpivkin Can we merge this PR?

[nikpivkin]

@knqyf263 Yeah, PR's ready.