[v2] Reduce invalid choice output

[hssyoo]

Currently, if a user supplies an invalid choice in a command, the error output contains all possible values (eg all service commands). This output is noisy, especially for developers who use screen readers. This PR reduces noise by removing all possible suggestions, keeping only suggestions that are similar to the supplied invalid choice.

Example:

> aws s3api hello-world

aws: error: argument operation: Found invalid choice 'hello-world'


usage: aws [options] <command> <subcommand> [<subcommand> ...] [parameters]
To see help text, you can run:

  aws help
  aws <command> help
  aws <command> <subcommand> help

Example with suggestion:

> aws s3api get-objeck

aws: error: argument operation: Found invalid choice 'get-objeck'

Maybe you meant:

  * get-object

usage: aws [options] <command> <subcommand> [<subcommand> ...] [parameters]
To see help text, you can run:

  aws help
  aws <command> help
  aws <command> <subcommand> help