Template GMGPolar class on DomainGeometry

[EmilyBourne]

As per #131 inheritance must be removed from kernels in order to port them to GPU. Concepts are used as a drop-in replacement for superclasses to enforce prototypes. This work is started with DomainGeometry's use in GMGPolar.

Merge Request - GuideLine Checklist

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As many checkboxes as possible should be ticked.

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Always to be checked:

• There is at least one issue associated with the pull request.
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• No large data files have been added to the repository. Maximum size for files should be of the order of KB not MB. In particular avoid adding of pdf, word, or other files that cannot be change-tracked correctly by git.

If functions were changed or functionality was added:

• Tests for new functionality has been added
• A local test was succesful

If new functionality was added:

• There is appropriate documentation of your work. (use doxygen style comments)

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• Did you pay attention to its license? Please remember to add it to the wiki after successful merging.

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Checks by code reviewer(s):

• Is the code clean of development artifacts e.g., unnecessary comments, prints, ...
• The ticket goals for each associated issue are reached or problems are clearly addressed (i.e., a new issue was introduced).
• There are appropriate unit tests and they pass.
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• No large data files have been added to the repository. Maximum size for files should be of the order of KB not MB. In particular avoid adding of pdf, word, or other files that cannot be change-tracked correctly by git.

[codecov]

Codecov Report

❌ Patch coverage is 88.63636% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.15%. Comparing base (6c8ca13) to head (e00f038).

Files with missing lines	Patch %	Lines
include/GMGPolar/setup.h	85.00%	15 Missing ⚠️
src/ConfigParser/select_test_case.cpp	41.66%	7 Missing ⚠️
include/GMGPolar/writeToVTK.h	0.00%	2 Missing ⚠️
src/GMGPolar/gmgpolar.cpp	98.55%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #136      +/-   ##
==========================================
- Coverage   88.21%   88.15%   -0.07%     
==========================================
  Files          89       92       +3     
  Lines        5246     5249       +3     
==========================================
- Hits         4628     4627       -1     
- Misses        618      622       +4     

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[julianlitz]

📝

[julianlitz]

The executables

src/convergence_order.cpp
src/weak_scaling.cpp
src/strong_scaling.cpp

are now broken, since they are not yet adjusted to the new interface.
Let me know if we want to fix this with this PR or deal with it in the future.

The interface will change again with the next upcoming changes, so it is likely not worth the effort to do this now.