[release-4.20] OCPBUGS-66241: Fall back to simpler behavior, if setsid,ps,pkill are not installed

[openshift-cherrypick-robot]

This is an automated cherry-pick of #2153

/assign ardaguclu

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[openshift-ci-robot]

@openshift-cherrypick-robot: Jira Issue OCPBUGS-65925 has been cloned as Jira Issue OCPBUGS-66241. Will retitle bug to link to clone.
/retitle [release-4.20] OCPBUGS-66241: Fall back to simpler behavior, if setsid,ps,pkill are not installed

In response to this:

This is an automated cherry-pick of #2153

/assign ardaguclu

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[openshift-ci-robot]

@openshift-cherrypick-robot: This pull request references Jira Issue OCPBUGS-66241, which is invalid:

• release note text must be set and not match the template OR release note type must be set to "Release Note Not Required". For more information you can reference the OpenShift Bug Process.
• expected dependent Jira Issue OCPBUGS-65925 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is MODIFIED instead

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

This is an automated cherry-pick of #2153

/assign ardaguclu

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[ardaguclu]

/label backport-risk-assessed
/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ardaguclu, openshift-cherrypick-robot

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[openshift-ci]

@openshift-cherrypick-robot: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/security	12889b8	link	false	/test security

Full PR test history. Your PR dashboard.

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