chore(charts,x509-certificate-exporter): monitor specific file extension

[PixiBixi]

As you introduce a recent feature to monitor specific file extension, i've applied it into the helm chart.

You have to use values.yaml like this

---
hostPathsExporter:
  daemonSets:
    nodes:
      watchSpecificExtensionDirectories:
        - directory: /etc/kubernetes/ssl/
          extension: pem

After an helm template, it will template it like this

        args:
        - --listen-address=:9793
        - --trim-path-components=3
        - --watch-dir=/mnt/watch/dir-3c7986266497f70a0ca6dc6776cc96e1e1d3dcb6//etc/kubernetes/ssl/*.pem
        - --max-cache-duration=300s
        volumeMounts:
        - name: dir-3c7986266497f70a0ca6dc6776cc96e1e1d3dcb6
          mountPath: /mnt/watch/dir-3c7986266497f70a0ca6dc6776cc96e1e1d3dcb6//etc/kubernetes
          readOnly: true
        ports:
        - name: metrics
          containerPort: 9793
      hostNetwork: false
      volumes:
      - name: dir-3c7986266497f70a0ca6dc6776cc96e1e1d3dcb6
        hostPath:
          path: /etc/kubernetes/ssl
          type: "Directory"

[monkeynator]

🎉 This PR is included in version 3.18.0 🎉

The release is available on GitHub release

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