CV32E40Pv2 W43 updates

Created by: XavierAubert

This PR main topics are :

• Updates to the regression scripts & file for Questa Vrun to allow disk space usage reduction (around 90% space saved) The logic chosen is : removing all logs and intermediate files if a test is successful, otherwise keep but compress logs, see XavierAubert#64 for details
• Questa Vrun default seeding behaviour was to keep the same seeds everytime, I made it customizable with a vrun cmd option (see for details XavierAubert#66)
• I added a way to cleanly generate one .rmdb from multiple regress file inputs. With this, I also made it possible to customize the cfg and number of tests for each selected regress file. I also cleaned-up all the unused left over regress files. See XavierAubert#71
• @dd-vaibhavjain made some corrections to the riscv-arch-suite execution to get correct repo tag in the report & various other fixes described here XavierAubert#68
• @dd-baoshan introduced a first test draft to highlight a bug found in mstatus.FS field. This test still needs to be refined but we pushed it to be available to design team for debug. See XavierAubert#70