Which component are you using?:

/area cluster-autoscaler

Is your feature request designed to solve a problem? If so describe the problem this feature should solve.:

Cluster Autoscaler has a --cordon-node-before-terminating flag, but it is set to false by default. I think we should always cordon nodes before deleting them.

Describe the solution you'd like.:

• (short term) Flip the default flag value to true. Mark the flag as deprecated & planned for removal.
• (in 1-2 minor releases) Delete the flag.

Describe any alternative solutions you've considered.:

Keep as is. Or keep the flag. I didn't find any good reason to do any of these things.

Additional context.:

Lack of cordoning has been a pain point since forever (#1136, #2505, #2868, #3648). It was later added as an option hidden behind a flag, but it could just work out of the box instead of requiring manual setup.