[node] Add support for ephemeral storage

[BulatSaif]

Fixes: https://github.com/paritytech/helm-charts/issues/145

Description

This PR updates the node Helm chart from version 5.9.0 to 5.10.0. It introduces the option to mount volumes using emptyDir or Generic ephemeral volumes instead of PersistentVolumeClaims (PVCs), which can be useful for testing scenarios where persistent storage is not necessary.

Changes

• Added ephemeral volume configuration for chainData and collatorRelayChain.chainData.

  node:
    chainData:
      ephemeral:
        enabled: false
        type: emptyDir # emptyDir or generic
    collatorRelayChain:
      chainData:
        ephemeral:
          enabled: false
          type: emptyDir # emptyDir or generic

Purpose

• Testing flexibility: The introduction of ephemeral volumes provides a more flexible and faster setup for testing environments where persistent storage is not required.