11.3.1: style: Improve copy of log messages [CY-2634] (#252)

* style: Improve error message when there is no API token defined

Makes it more explicit that:
- A "project token" is a project API token
- An "api token" is an account API token

* fix: Test for scenario when "no token is used"

* Update link to documentation on uploading partial reports

* Edit and improve copy of log messages

* Update log message to explicitly mention UUID