refactor(fourc_mc_tests): convert dat to yaml

[gilrrei]

Description and Context

Convert one of the 4C tests types to yaml. The other one can't be transformed since the external geometry still relies on dat

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• My commit messages mention the appropriate issue numbers (advised but optional).
• I mention the appropriate issue numbers in this PR.
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• I have added tests to cover my changes.

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[maxdinkel]

Can we delete the corresponding .dat file?

[gilrrei]

Can we delete the corresponding .dat file?

Nope, because one of the external geometry tests (I think for the ensight postprocessor) is based on the dat file. The good news is that @amgebauer is working on lnmmeshio to introduce full yaml support such that later on the entire external geometry will become much much easier

[maxdinkel]

Can we delete the corresponding .dat file?

Nope, because one of the external geometry tests (I think for the ensight postprocessor) is based on the dat file. The good news is that @amgebauer is working on lnmmeshio to introduce full yaml support such that later on the entire external geometry will become much much easier

But then I would propose to wait for the implementation in lnmmeshio. Otherwise we will have to maintain an extra input file.

[gilrrei]

But then I would propose to wait for the implementation in lnmmeshio. Otherwise we will have to maintain an extra input file.

I don't know how soon somebody will change the code to lnmmeshio, but I think it is important to start testing yaml files for 4C as soon as possible is important. If you oppose maintaining a single additional file is too much we can close this PR.

[maxdinkel]

But then I would propose to wait for the implementation in lnmmeshio. Otherwise we will have to maintain an extra input file.

I don't know how soon somebody will change the code to lnmmeshio, but I think it is important to start testing yaml files for 4C as soon as possible is important. If you oppose maintaining a single additional file is too much we can close this PR.

I don't have a strong opinion on this. If you think it's important to test it with .yml input, we can also maintain an extra file.

[leahaeusel]

I tend to agree with @gilrrei that we should start testing yaml files for 4C.

[leahaeusel]

Suggested change

	This is a simple test that tests the extrapolation of stressees from Gauss points to nodes for a
	hex8 discretization tested date: 19.12.2024
	This is a simple test that tests the extrapolation of stresses from Gauss points to nodes for a
	hex8 discretization. Tested date: 19.12.2024

[leahaeusel]

Is the .4C in the file name really necessary if the file is already in a folder named fourc?