configuration.sidecars was annotated with kubebuilder:validation:Type=object
while SidecarContainers is a []v1.Container, so the generated schema rejected
every list value and global sidecars could not be configured at all.
Drop the hand-written Schemaless/Type=object markers and let controller-gen
derive the schema from the Go type, the same way spec.initContainers is
already handled in the Postgresql CRD. The field now renders as type: array
with a full Container schema for its items.
Fixes#3159
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
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