Simplify Deployment args

[sean-smith]

• Add tag (version) as a parameter for deployment
• Simplify the deployment by removing need for monitoring tarball and monitoring dir. This will default to /home/${cfn_cluster_user}/aws-parallelcluster-monitoring

New deployment syntax looks like:

CustomActions:
        OnNodeConfigured:
          Script: https://raw.githubusercontent.com/aws-samples/aws-parallelcluster-monitoring/main/post-install.sh
          Args:
            - v0.9

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