fix: webhook path, CRD chain enum sync, batch script exit code

Three real bugs surfaced by the manual batch e2e workflow:

1. Webhook path mismatch — kubebuilder marker on ChainInstanceValidator
   still pointed at /validate-nodes-chainplane-io-... from the old
   nodes.k8s-bch.io group, so admission requests for chains routed by
   ValidatingWebhookConfiguration to /validate-chains-... got "the
   server could not find the requested resource". Renamed marker to
   match the new chains.chainplane.io group and regenerated
   config/webhook/manifests.yaml plus the chart's webhook template.

2. Chart CRD was out of sync — charts/chainplane/templates/crds/
   chains.chainplane.io_chaininstances.yaml shipped an enum of 18
   chains while the Go type lists 95. Re-vendored both
   chaininstances.yaml and chainversioncatalogs.yaml from
   config/crd/bases/ so the chart's enum matches the source of truth.

3. scripts/manual-batch-test.sh tallied failures inside a `{ ... } |
   tee` subshell, so `fail` was always 0 in the parent and the script
   exited 0 even when every batch failed. Split tee out and count
   failures in the parent shell.

Context: gh run 25135219989 (the first sweep of all 103 samples) came
back conclusion=success despite 103 FAIL rows in summary.txt. Pulled
the artifact, grepped logs, found "Unsupported value" (CRD enum) and
"failed calling webhook" (path), then traced the script bug from the
exit-code anomaly. ~30min of investigation, ~10min of fixes.

Author: tazhate

api/v1alpha2/chaininstance_webhook.go

@@ -197,7 +197,7 @@ func (r *ChainInstance) SetupWebhookWithManager(mgr ctrl.Manager) error {
 }
 
 // ChainInstanceValidator implements webhook.CustomValidator for ChainInstance.
-// +kubebuilder:webhook:path=/validate-nodes-chainplane-io-v1alpha2-chaininstance,mutating=false,failurePolicy=fail,sideEffects=None,groups=chains.chainplane.io,resources=chaininstances,verbs=create;update,versions=v1alpha2,name=vchaininstance.kb.io,admissionReviewVersions=v1
+// +kubebuilder:webhook:path=/validate-chains-chainplane-io-v1alpha2-chaininstance,mutating=false,failurePolicy=fail,sideEffects=None,groups=chains.chainplane.io,resources=chaininstances,verbs=create;update,versions=v1alpha2,name=vchaininstance.kb.io,admissionReviewVersions=v1
 type ChainInstanceValidator struct{}
 
 var _ webhook.CustomValidator = &ChainInstanceValidator{}