Sonarcloud warnings

[thirtytwobits]

1. The property 'sonar.login' is deprecated and will be removed in the future. Please use the 'sonar.token' property instead when passing a token.

2. The following error(s) occurred while trying to import coverage report:
   Invalid directory path in 'source' element: /__w/nunavut/nunavut

3. No report was found for sonar.python.xunit.reportPath using pattern .tox/py39-test/tmp/xunit-result.xml

[thirtytwobits]

This was fixed as part of other 3.0 modernizations