postTimestepConcrete of local assemblers.

OpenMP parallelized assembly

See merge request ogs/ogs!4556

Lars Bilke authored 1 year ago and Christoph Lehmann committed 1 year ago

- Implementation in AddTest(), variants are automatically added.
- Currently for TH2M and ThermoRichardsMechanics
- Use 4 threads (ctest scheduling takes this into account too, no system
  overload)
- Can be selected with e.g.: ctest -L ^omp

Work around xvfb-run quirks

See merge request ogs/ogs!4577

Control which variable is written

See merge request ogs/ogs!4557

This makes using "eval" unnecessary in the CI job shell scripts.