Pass on RealT in TreeMesh construction

[DanielDoehring]

Unfortunately I introduced a type instability in #2129

Before #2129 & with this PR:

Currently:

This slipped through the tests as this function is only being called by analysis functions, which we do not benchmark for allocations (maybe better do this ?)

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.39%. Comparing base (af3d3fc) to head (6ec7024).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2191      +/-   ##
==========================================
- Coverage   96.39%   96.39%   -0.00%     
==========================================
  Files         483      483              
  Lines       38353    38349       -4     
==========================================
- Hits        36968    36964       -4     
  Misses       1385     1385              

Flag	Coverage Δ
unittests	96.39% <100.00%> (-<0.01%)	⬇️

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[ranocha]

Thanks! Please add an @inferred test for this - somewhere to the unit tests?

[ranocha]

Thanks a lot!