Adapt system tests setup for fenics-adapter

[MakisH]

Related to precice/fenics-adapter#202 and precice/fenics-adapter#201

Triggered a system tests build: https://github.com/precice/tutorials/actions/runs/21912133144 (failing for unrelated reasons: https://gitlab.com/openfoam/core/openfoam/-/issues/3496)

Checklist:

• I added a summary of any user-facing changes (compared to the last release) in the changelog-entries/<PRnumber>.md.
• I will remember to squash-and-merge, providing a useful summary of the changes of this PR.

[MakisH]

I triggered the tests again. The adapter builds successfully:

#21 [solid-fenics fenics_adapter 3/3] RUN python3 -m venv --system-site-packages /home/precice/venv &&     . /home/precice/venv/bin/activate &&     pip3 install git+https://github.com/precice/fenics-adapter.git@master
#21 27.70   Building wheel for pyprecice (pyproject.toml): finished with status 'done'
#21 27.70   Created wheel for pyprecice: filename=pyprecice-3.3.1-cp312-cp312-linux_x86_64.whl size=679878 sha256=3157ea5a1812e4c632f637b5891125a1789716a128aa46a25364495a5cf4d94f
#21 27.70   Stored in directory: /home/precice/.cache/pip/wheels/f5/ab/66/3eaa75a00c5e687e063c114dd2bc530f58860be06eacf622a1
#21 27.70 Successfully built fenicsprecice pyprecice
#21 27.81 WARNING: Skipping /usr/lib/python3.12/dist-packages/pybind11-2.11.1.dist-info due to invalid metadata entry 'name'
#21 27.89 Installing collected packages: scipy, pyprecice, fenicsprecice
#21 33.94 Successfully installed fenicsprecice-2.2.0rc1+2.g9d0d6bf pyprecice-3.3.1 scipy-1.17.0
#21 DONE 34.7s

but when starting the case, the module is not found:

  File "/runs/flow-over-heated-plate_fluid-openfoam-solid-fenics_2026-02-13-172641/solid-fenics/solid.py", line 10, in <module>
    from fenicsprecice import Adapter
ModuleNotFoundError: No module named 'fenicsprecice'