COMPLETE FIRST MILESTONE: same xsec AND same events.lhe (except color and helicity) in fortran and in cuda or cpp

[valassi]

This completes my first desired milestone for comparing fortran and cudacpp MEs:

• as from the previous PR Use non-zero t-channel widths in fortran as in cudacpp (recover the same physics precision in fortran and cudacpp to 10+ digits) #490 we now get the same xsec to 10+ digits for all five processes
• in this new simple PR I just check that we also get the same events.lhe files for all five processes (except for random color Randomly pick one color for each event written to file (jamp2 handling) #402 and random helicity Randomly pick one helicity for each event written to file #403)

In practice, I added a simple script that modified the fortran events.lhe to remove the color and helicity info, then I compare this to those I get from cuda and cpp

Next step will be the random color and helicity, see also #404.

[valassi]

All tests pass, I self merge