Add ability to set test targets per project
Part of gitlab-org/quality/quality-engineering&37
The ability to configure test thresholds per project should be added to enable better handling. This requires being able to set test targets for RPS and TTFB P90 specifically for the project and defaulting to the default if not specified.
For the current design this may be best as part of the Project settings file, with the optional targets loaded in accordingly.