update regression test files for old intrinsic models

I added regression tests a while ago testing if older pet files that only saved parameters of one model were still correctly loaded, but probably while updating the version of the pet file the test files also got the new syntax, effectively making the tests pointless. So I reversed the changes and remade the pet files in the old version and syntax.

Reviewer Checklist

General code quality

• naming conventions are met (see .clang-tidy for detailed information)
• no static analyzer warnings in new code parts (e.g., use clang-tidy for checking)

General usability

• old versions of pet-files are still loadable
• documentation updated (if applicable)

Only if changes in UI

• new elements are also saved and loaded from pet-file
• check if tab order is still correct
• all new SpinBoxes are promoted
• new keybindings added to Petrack::keyBindings()

Closes #516 (closed)

added CI bug labels

assigned to @l.dressen

added 12 commits

• 0bd871b4...0ffe809b - 10 commits from branch master
• 9fc16cd5 - update test files
• c9e11831 - Merge remote-tracking branch...

Compare with previous version

requested review from @t.arens

Could you fill out the description of the merge request to specify what and why the files were changed e.g. why the update was necessary?

changed the description

resolved all threads

marked the checklist item naming conventions are met (see .clang-tidy for detailed information) as completed

marked the checklist item no static analyzer warnings in new code parts (e.g., use clang-tidy for checking) as completed

marked the checklist item old versions of pet-files are still loadable as completed

marked the checklist item documentation updated (if applicable) as completed

marked the checklist item new elements are also saved and loaded from pet-file as completed

marked the checklist item check if tab order is still correct as completed

marked the checklist item all new SpinBoxes are promoted as completed

marked the checklist item new keybindings added to Petrack::keyBindings() as completed

approved this merge request

added 7 commits

• c9e11831...116cf61c - 6 commits from branch master
• 402d6f04 - update test files

Compare with previous version

merged

mentioned in commit 11887358