Backport of deps: Switch from mitchellh/cli to hashicorp/cli into release/1.9.x

[hc-github-team-nomad-core]

Backport

This PR is auto-generated from #19321 to be assessed for backporting due to the inclusion of the label backport/1.9.x.

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The person who merged in the original PR is:
@jrasell
This person should manually cherry-pick the original PR into a new backport PR,
and close this one when the manual backport PR is merged in.

merge conflict error: POST https://api.github.com/repos/hashicorp/nomad/merges: 409 Merge conflict []

The below text is copied from the body of the original PR.

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Thanks @angrycub!

This PR switches from the achieved mitchellh/cli to the internally maintained hashicorp/cli. A semgrep rule is included to stop usage of this library in the future.

The change is like-for-like, therefore my plan is to backport this to all active release branches. Additionally, backporting CLI bug fixes might be painful without this. If any reviewers think this is a bad idea, please let me know.

The remaining indirect reference is due to github.com/hashicorp/go-secure-stdlib/listenerutil which has migrated the library on main, but not released this version. I have submitted a request for a release via hashicorp/go-secure-stdlib#151. Once released, we can followup with a dependency update PR to remove the indirect dependency.

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