nit: Helm Chart uses "ibm-blockchain-*-pvc" for both PV (and PVC)

[DazWilkin]

Recommend:

• Either map names correctly to types
• Or (my preference) generalize the names (removing the K8s type) perhaps:
  • "shared" or "shared-volume"
  • "composer" or "composer-volume"

For both Shared and Composer (although Composer is removed from Chart):

https://github.com/IBM-Blockchain/ibm-container-service/blob/ff63248a583c4e548181d347d02fe3fe63b644ee/helm-charts/ibm-blockchain-network/templates/_helpers.tpl#L22

https://github.com/IBM-Blockchain/ibm-container-service/blob/ff63248a583c4e548181d347d02fe3fe63b644ee/helm-charts/ibm-blockchain-network/templates/_helpers.tpl#L38

Shared PersistentVolume:
https://github.com/IBM-Blockchain/ibm-container-service/blob/ff63248a583c4e548181d347d02fe3fe63b644ee/helm-charts/ibm-blockchain-network/templates/shared-pvc.yaml#L6

Shared PersistentVolumeClaim:
https://github.com/IBM-Blockchain/ibm-container-service/blob/ff63248a583c4e548181d347d02fe3fe63b644ee/helm-charts/ibm-blockchain-network/templates/shared-pvc.yaml#L25