up until now, elliptic curves have been hardcoded in the benchmarks, forcing to run them on all supported curves...

this MR makes it possible to use only a subset of curves.

> 💡 **Note**  
> when running the same commands from !104, minus the "inbreeding" ones which are not affected by this MR, the time goes from 12min 33sec to 4min 28sec 🎉 


## TODO
- [x] setup
- [x] commit
- [x] recoding
- [x] fec
- [ ] linalg
- [ ] setup size
- [ ] field operations
- [ ] group operations

> 💡 **Note**  
> because all the unticked bullet points above are far from critical to the paper and do require to measure all curves, i won't change these for now