Use hash of the cluster stack instead of git commit hash

[aniruddha2000]

/kind feature

Describe the solution you'd like
[A clear and concise description of what you want to happen.]
Independence from Git: This means csmctl can be used in a regular directory without a git repository, enhancing its versatility.

Immediate hash updates with changes in the cluster stack: This would eliminate the need for committing changes to get a new hash. It reduces the risk of errors, such as forgetting to commit changes, which can lead to significant delays

The only potential downside might be the loss of a one-to-one relationship between the commit hash and the cluster-stack hash in the CI process. However, I can't foresee a scenario where this would be a significant issue.

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• csmctl version: (use kubectl version)