[welltest_dpds] Add option to export dpds measurement file

[eivindsm]

Add option to export ert measurement file for dpds consistent with time stepping as defined by saphire file used with option --genobs_resultfile. File exported could then be included as observation file in ert.

[alifbe]

@eivindsm I am trying to pick up this issue now but not quite sure if I understand what you mean. I see you made this commit d452c03 which will generate GEN_DATA file. Do you mean to create GEN_OBS file (with uncertainty) or something else ?

[eivindsm]

Great to see welltest_dpds is getting some love! I honestly do not remember anymore. I guess the idea would be to achieve what is described here; https://wiki.equinor.com/wiki/index.php/FMU_welltest_obs and replace the dedicated python script Cecilie created long time ago.