Add a terminate clusters subcommand as alias

[daureg]

Describe the issue

One can start & restart cluster with the CLI (which match the label in UI), but to terminate a cluster one must call databricks clusters delete, which is not intuitive

Steps to reproduce the behavior

databricks clusters terminate --help

Expected Behavior

I would expect the same behavior as databricks clusters delete --help

Actual Behavior

It just shows the general cluster help

OS and CLI version

Databricks CLI v0.228.1 on linux

Is this a regression?

No

Debug Logs

N/A