Changes

Test different f90 vs jax flags (#1357)

* wip

* wip

* test is basically done -> find out why some jax runs fail, mabe also run fortran even if jax fails

* fortran is tested regardless of whether jax fails

* changed jenkinsfile + removed l_Lscale_plume_centered from flag file + flag_set readme + lil print F90 fix

* added comments and a new flagset for jax tests

* added new jax flag config file to Jenkinstest