chart/redpanda: Set securityContext.runAsNonRoot to false for tuning container

(cherry picked from commit f187f32)

# Conflicts:
#	charts/redpanda/chart/templates/_statefulset.go.tpl
#	operator/internal/lifecycle/testdata/cases.pools.golden.txtar

Author: RafalKorepta

.changes/unreleased/charts-redpanda-Fixed-20251103-205145.yaml

@@ -0,0 +1,5 @@
+project: charts/redpanda
+kind: Fixed
+body: |
+    Fix `CreateContainerConfigError: Error: container's runAsUser breaks non-root policy...` error with `statefulset.podTemplate.spec.securityContext.runAsNonRoot: true`
+time: 2025-11-03T20:51:45.198677+02:00

charts/redpanda/chart/templates/_statefulset.go.tpl

@@ -395,9 +395,10 @@ func statefulSetInitContainerTuning(dot *helmette.Dot) *corev1.Container {
 			Capabilities: &corev1.Capabilities{
 				Add: []corev1.Capability{`SYS_RESOURCE`},
 			},
-			Privileged: ptr.To(true),
-			RunAsUser:  ptr.To(int64(0)),
-			RunAsGroup: ptr.To(int64(0)),
+			Privileged:   ptr.To(true),
+			RunAsNonRoot: ptr.To(false),
+			RunAsUser:    ptr.To(int64(0)),
+			RunAsGroup:   ptr.To(int64(0)),
 		},
 		VolumeMounts: append(append(CommonMounts(dot),
 			templateToVolumeMounts(dot, values.Statefulset.InitContainers.Tuning.ExtraVolumeMounts)...),