Allow setting relabelings and metricRelabelings for hpe-array-exporter & hpe-csi-info-metrics

[aw1cks]

This PR allows setting relabelings and metricRelabelings on the serviceMonitor of the hpe-array-exporter and hpe-csi-info-metrics charts.

Here is an example usage, which makes the metric names consistent across all array types:

serviceMonitor:
  metricRelabelings:
    - sourceLabels: [__name__]
      action: labelmap
      regex: "cpg|pool"
      replacement: "storagepool"
    - sourceLabels: [__name__]
      regex: "^hpe(primera|nimble|3par|alletra6000|alletra9000)_(.*)"
      targetLabel: "__name__"
      replacement: "hpe_$2"
    - sourceLabels: [__name__]
      regex: "^hpe_(pool|cpg)_(.*)"
      targetLabel: "__name__"
      replacement: "hpe_storagepool_$2"

[datamattsson]

Thank you for your contribution. This PR will be considered for the next build, no ETA as of now.