[poetry] Error fixes

See merge request ogs/ogs!3954

https://github.com/python-poetry/poetry/issues/4210

Enable parallel computing in TRM with Taylor-Hood elements

See merge request ogs/ogs!3920

Remove std::filesystem hacks

Closes #3246

See merge request ogs/ogs!3951

TH2M Thermal conductivity revised

See merge request ogs/ogs!3942

Fixes CI job with poetry.

Now, thermal conductivity is a medium property, individual phase thermal conductivities are required only if in case of a mixing rule.

[cmake] Added option OGS_INSTALL_PETSC to install petsc into CMAKE_INSTALL_PREFIX

See merge request ogs/ogs!3950

E.g.:

```
cmake -S . --preset release-petsc \
  -DCMAKE_INSTALL_PREFIX=../install/release-petsc \
  -DOGS_INSTALL_PETSC=ON
cmake --build --preset release-petsc -t install
```

Please note that currently the install location is not relocatable!
Absoulte path to petsc-lib has to be replaced with an rpath equivalent.
On Mac this works:

```
install_name_tool -change /Users/bilke/code/ogs/install/release-petsc/lib/libpetsc.3.11.dylib @rpath/libpetsc.3.11.dylib ./ogs
```

TODO: Linux

[MPL] New property ideal gas law for binary gases

See merge request ogs/ogs!3945

Some small improvements.

See merge request ogs/ogs!3948

Fixes CI job with poetry.

[ci] Simple Notebook testrunner.

See merge request ogs/ogs!3930