Add support for sonar hotspots

[drdavella]

Currently we only fetch and upload results from the Sonar issues API. We also need to get results from the hotspots API and upload them to our platform.

Hotspots API is documented here: https://next.sonarqube.com/sonarqube/web_api/api/hotspots

We will need to upload the hotspots results to the sonar_hotspots endpoint. Also the existing sonar endpoint for issues is deprecated in favor of sonar_issues.

[drdavella]

Note: this will not be added as a new kind of tool. Instead, it will be added to the existing sonar upload. Instead of making a single request to the Sonar API, we will need to make two: one for issues and one for hotspots. Then we will need to make two uploads to the Pixee analysis inputs API: one for sonar_issues and one for sonar_hotspots.