Figure out fair PHD requirement weights

**Describe the solution you'd like**

Our current values are pretty far from ideal. We need to come up w/ a fair requirement weights for all level projects (the weights are going to be the same for all levels but each level requirement threshold can be different).

**Are you going to work on implementing this?**

- [x] Yes
- [ ] No

**Additional context**
They are currently part of `owasp_update_health_metrics_scores` command.