eksctl anywhere completion bash does not work

I am trying to set up bash completion for eksctl anywhere using `source <(eksctl anywhere completion bash)`, but it doesn't seem to work. Bash doesn't actually complete anything.

I can see that `eksctl anywhere completion bash` returns the relevant output, but it seems to be unused when sourced...

To reproduce it, just run `source <(eksctl anywhere completion bash)`, then start typing `eksctl anywhere `.

EKS Anywhere Release: `0.7.2`
eksctl version: `0.86.0`
OS: Using `Linux Ubuntu 20.04.4 LTS (Focal Fossa)` and `macOS Monterey 12.2.1`, but this issue occurs on any bash.

Reproduce the issue with `source <(eksctl anywhere completion bash)` and the `eksctl anywhere ` sequence. Start from the CLI completion command and follow how its generated Bash output is consumed; done means the expected subcommands appear during Bash completion on the reported environments.

Written by the indexing model from the issue text.