Add newBackend-daeMode job

[casella]

We should add a test job (to be run on demand) that uses --newBackend and --daeMode.

[AnHeuermann]

I added a boolean parameter newBackend_daeMode to our Jenkins job and started a job: https://test.openmodelica.org/jenkins/job/LibraryTesting/job/LibraryTest/10564/