Org slug vs id

[armcknight]

Description

I found it confusing that after running sentry-cli login --global, the token in the ~/.sentryclirc embeds the org slug, and then if I try to run something like sentry-cli upload --org <org-id>, it complains about a mismatch between the token and the id, even though they both represent the same thing.

Two ideas I have are:

1. reduce slug/id to a canonical version before comparing, so you never try to compare a slug to an id, even if they're for the same org
2. we need a way to know if we're dealing with a slug or id, since they're both just strings, and our IDs don't have any standard prefix. this indicates to me that we should actually have separate cli parameters like --org-slug and --org-id instead of simply --org that can accept either.