Remove mounting the /var/run path from host to agent

[anubhabMajumdar]

Describe the bug

retina-agent mounts /var/run from host directory. This can have potential issue as it can overwrite data in the directory.

Fixes:

• Restrict access to only /var/run/cilium directory for retina-agent
• Investigate if we can use DirectoryOrCreate and remove pkg/ciliumfs/setup.go .

Platform (please complete the following information):

• OS: Linux
• Kubernetes Version: All versions
• Host: AKS
• Retina Version: