Use option_args when running accessories in a new container

[9c23a5]

This PR adds option_args to the command generated when running kamal accessory exec <accessory_name> <command>. These same options are passed when launching the accessory container, which causes inconsistent behaviour.

With this change now new ephemeral containers will be created with the same options as when the application is deployed. This is how kamal app exec works too: https://github.com/basecamp/kamal/blob/main/lib/kamal/commands/app/execution.rb#L10-L24

For example:

# config/deploy.yml
accessories:
  my-accessory:
    image: my-image
    options:
      ulimit: nofile=8192:8192

$ kamal accessory exec my-accessory "sh -c 'ulimit -n'" --reuse
Launching command from existing container...
  INFO [64004c8b] Running docker exec my-accessory sh -c 'ulimit -n' on my-instance
  INFO [64004c8b] Finished in 0.128 seconds with exit status 0 (successful).
App Host: my-instance
8192

$ kamal accessory exec my-accessory "sh -c 'ulimit -n'"
Launching command from new container...
  INFO [b82673a5] Running docker login [...]
  INFO [b82673a5] Finished in 2.001 seconds with exit status 0 (successful).
  INFO [1b05cc09] Running docker run --rm --network kamal --env [REDACTED] --env-file [REDACTED] --volume [REDACTED] my-image sh -c 'ulimit -n' on my-instance
  INFO [1b05cc09] Finished in 0.407 seconds with exit status 0 (successful).
App Host: my-instance
1024 # default value, should be 8192 from the options configured