Save reports in a map to keep the order

[jorblancoa]

• Fix deadlock that could happen when looping through the reports and 2 different ranks start preparing datasets for different reports and wait for eachother

[jorblancoa]

GitlabCI

Current version https://bbpgitlab.epfl.ch/hpc/sim/blueconfigs/-/pipelines/49396

Neurodamus multipop branch https://bbpgitlab.epfl.ch/hpc/sim/blueconfigs/-/pipelines/49400