Remove ECK quitquitquit

General MR

Summary

• Removes the deprecated package-level istio.injection value/docs.
• Keeps the CRD upgrade hook while removing the obsolete Istio sidecar /quitquitquit shutdown behavior entirely.
• Adds tests/test-values-ambient.yaml for Big Bang Ambient validation coverage.
• Bumps the package version to 3.3.2-bb.1 and updates release docs.

Relevant logs/screenshots

Click for live cluster results

eck-operator   istio.io/dataplane-mode=ambient
logging        istio.io/dataplane-mode=ambient
istio-system   istio-injection=disabled

ztunnel:

ztunnel-2b4dk   1/1   Running   k3d-k3s-default-server-0
ztunnel-8wz49   1/1   Running   k3d-k3s-default-agent-0
ztunnel-j8gjd   1/1   Running   k3d-k3s-default-agent-1
ztunnel-r4rpf   1/1   Running   k3d-k3s-default-agent-2

ECK pod:

elastic-operator-0 redirection=enabled containers=manager

EK pods:

logging-ek-es-data-0 redirection=enabled containers=elasticsearch
logging-ek-es-data-1 redirection=enabled containers=elasticsearch
logging-ek-es-master-0 redirection=enabled containers=elasticsearch
logging-ek-kb-55f894b6b7-5pbqz redirection=enabled containers=kibana
logging-ek-metrics-cb65d84db-wxl5v redirection=enabled containers=exporter

Linked Issue

Closes #155 (closed)

Upgrade Notices

No user action is required. The ECK Operator CRD upgrade hook no longer attempts to terminate an Istio sidecar with /quitquitquit; native sidecar lifecycle handling is expected to manage sidecar shutdown.