Get droplet by name does not work in the case your name is a number

**Describe the Issue:**

1. Create a new droplet with a name that contains only numbers (e.g.: 123456)
2. Try to get this droplet using `doctl compute droplet get 123456`
3. Notice that you will get a 404 even though the get is supposed to retrieve results by name as well

**Environment:**
- doctl version: doctl version 1.69.0-release
- OS: Ubuntu 20.04
- Installation method: Snap package

**Additional Details:**

I guess that if the get endpoint sees a number, it will try to get it by ID but will omit to try to get it by name as well.