feat: enable adding annotations and labels to pvcs

[csatib02]

This PR enables adding labels and annotations to pvcs claimed by the fluentd STS.

Manually tested with the following manifest:

apiVersion: logging.banzaicloud.io/v1beta1
kind: Logging
metadata:
  name: all-to-file
spec:
  controlNamespace: default
  fluentd:
    bufferStorageVolume:
      pvc:
        labels:
          app: logging
        annotations:
          app: logging
        source:
          claimName: manual
          readOnly: false

STS:

PVC:

[sebastiangaiser]

TYVM 🚀