fix(helm): resolve redundant double slashes (//) in certificate monit…

[longxiucai]

In the Helm template generation of certificate monitoring paths, incorrect path concatenation logic resulted in redundant double slashes (//) in --watch-file and --watch-kubeconf parameters, e.g.:

...
    - --watch-file=/mnt/watch/file-9dff78b77fe2f4b0f34f77796df3fea5983e5d4b//var/lib/kubelet/pki/kubelet-client-current.pem
    - --watch-file=/mnt/watch/file-15d8ed7db7457d4f5108195ceb52a124a8703898//etc/kubernetes/pki/ca.crt
...
    volumeMounts:
    - mountPath: /mnt/watch/file-9dff78b77fe2f4b0f34f77796df3fea5983e5d4b//var/lib/kubelet/pki
      name: file-9dff78b77fe2f4b0f34f77796df3fea5983e5d4b
      readOnly: true
    - mountPath: /mnt/watch/file-15d8ed7db7457d4f5108195ceb52a124a8703898//etc/kubernetes/pki
      name: file-15d8ed7db7457d4f5108195ceb52a124a8703898
      readOnly: true
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: kube-api-access-vmn6h
      readOnly: true

This fix adjusts the path cleaning logic in templates to ensure only a single slash is maintained between the hash directory and certificate path.