add support for configuring cri-o pids_limit

[cristicalin]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:

This PR introduces a way to override cri-o pids_limit which is currently hardcoded to 1024.

Which issue(s) this PR fixes:

Fixes #7511

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Allow changing pids_limit for the cri-o container engine.

[k8s-ci-robot]

Hi @cristicalin. Thanks for your PR.

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[floryut]

@cristicalin Don't forget to fix the md issue

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cristicalin, floryut

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[cristicalin]

@floryut which md issue do you have in mind?

[cristicalin]

I updated the md with a different link format and a bit more detail on the ansible group but I'm not sure this is what you were referring to.

[floryut]

I updated the md with a different link format and a bit more detail on the ansible group but I'm not sure this is what you were referring to.

I was indeed referring to the link, and good for the added details 👍 thanks

[champtar]

/ok-to-test
/lgtm