Fix CLI plugins list command: use command parameters.

[JohnXLivingston]

Description

The plugins list command was not using --url, --username and --password parameters, and was always requesting on the first server in the .netrc file.

Has this been tested?

• 👍 yes, I added tests to the test suite
• 👍 yes, light tests as follows are enough
• 💭 no, because this PR is a draft and still needs work
• 🙅 no, because they aren't needed
• 🙋 no, because I need help

[Chocobozzz]

Thanks!