Add precompiled code into the python module in the expensive test

This MR adds the cmake flag -DDDUNE_ENABLE_PYTHONMODULE_PRECOMPILE in the expensive test to also cover this part of the buildsystem.

added buildsystem label

added 1 commit

• 4902c556 - Add precompiled code into the python module in the expensive test

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mentioned in merge request !1466 (merged)

added 3 commits

• 4902c556...7f1ccd13 - 2 commits from branch master
• 4e3f4dd2 - Add precompiled code into the python module in the expensive test

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merged

mentioned in commit 3fa3e337