Fix temperature parent mesh

[RemDelaporteMathurin]

Proposed changes

Fix for #986

Caveat: this will not work if the temperature field (as a function!) needs to be updated. Ie: CoupledHeatTransferHydrogenTransportProblem.

I tried implementing the quadrature space interpolation as proposed by @jorgensd on the discourse channel. But this wasn't giving satisfactory results so I decided instead to interpolate on a function of the submesh instead. It works, this is the concentration field with c=2* T and T = 800 + 100x + y on the top surface:

Types of changes

What types of changes does your code introduce to FESTIM?

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code refactoring
• Documentation Update (if none of the other choices apply)
• New tests

Checklist

• Black formatted
• Unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.73%. Comparing base (588429c) to head (4622e87).
⚠️ Report is 127 commits behind head on fenicsx.

Additional details and impacted files

@@             Coverage Diff             @@
##           fenicsx     #987      +/-   ##
===========================================
+ Coverage    95.71%   95.73%   +0.02%     
===========================================
  Files           46       46              
  Lines         2751     2764      +13     
===========================================
+ Hits          2633     2646      +13     
  Misses         118      118              

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