For some time, our Sonar cloud has been misreporting data to development branches. PRs to the master branch still have some value, but to the maintenance branches it looks to be having issues and possibly reporting things relating to master. We need to spend some time making sonar healthy again.

Notes:

• It is complaining about the version of Java being used, this should be considered
• It should work as before, correctly determining just changed files against all target branches
• We should consider updating our ruleset
  • One example is that it doesn't like our use of generics that aren't a single letter. We agreed that this is good for readability, so should suppress this where appropriate