feat: SecurityContexts to fullfill PodSecurity policy baseline

[camaeel]

SecurityContexts to fullfill PodSecurity policy baseline.

Adds containers securityContext settings.

Fixes: #217

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @camaeel. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[rjsadow]

/ok-to-test

[camaeel]

e2e test run with kind was successful:

Ginkgo ran 1 suite in 1h48m45.314845655s
Test Suite Passed
2024/10/18 21:01:41 Saving results at /tmp/results
23:01:41 INF Tests finished after 1h48m38s.
23:01:41 INF Downloading e2e.log to /Users/kamil/src/github.com/camaeel/hydrophone/_artifacts/results/e2e.log...
23:01:42 INF Downloading junit_01.xml to /Users/kamil/src/github.com/camaeel/hydrophone/_artifacts/results/junit_01.xml...
23:01:42 INF Waiting for Pod to terminate...
23:01:42 INF Container conformance-container terminated.
23:01:42 INF Deleted ClusterRoleBinding conformance-serviceaccount-role:conformance.
23:01:42 INF Deleted ClusterRole conformance-serviceaccount:conformance.
23:01:42 INF Waiting for Namespace conformance to be deleted.
23:02:20 INF Deleted Namespace conformance.
23:02:20 INF Tests completed successfully.
+ [[ false == \t\r\u\e ]]
+ [[ ! -z '' ]]

[camaeel]

@rjsadow, @dims @reetasingh Hi, any chance for review and approval? Or something is still missing before it can be successfully reviewed?

[dims]

/hold

for a discussion in #k8s-conformance slack - https://kubernetes.slack.com/archives/C78F00H99/p1730754208027609

[dims]

/hold cancel

[dims]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: camaeel, dims

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kubernetes-sigs/hydrophone/blob/main/OWNERS)~~ [dims] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment