Mutator webhook does not support native sidecars

When using native sidecars in a pod, the pods that the mutator uses, newrelic-infra-operator, do not support native side cars in k8s.

Description

The output when trying to apply a pod with a native sidecar, and the mutator webhook enabled for all pods in all namespaces.

spec.initContainers[1].livenessProbe: Forbidden: may not be set for init containers without restartPolicy=Always
spec.initContainers[1].readinessProbe: Forbidden: may not be set for init containers without restartPolicy=Always
spec.initContainers[1].startupProbe: Forbidden: may not be set for init containers without restartPolicy=Always

Expected Behavior

Pod creation is ok.

Troubleshooting or NR Diag results

Provide any other relevant log data. TIP: Scrub logs and diagnostic information for sensitive information

Steps to Reproduce

Enable the webhook in a cluster. Try to install a pod with a native sidecar. This is an init container with a restartPolicy set to Always, and startup, readiness, and liveness probes configured.

Your Environment

EKS, kubernetes 1.29

new relic infra operator version v0.19.2

Additional context

For Maintainers Only or Hero Triaging this bug

Suggested Priority (P1,P2,P3,P4,P5): Suggested T-Shirt size (S, M, L, XL, Unknown):

newrelic / newrelic-infra-operator