Set of improvements/fixes in Gridap.Adaptivity module

[JordiManyer]

Things part of this PR:

• New: Implement get_face_subface_ldof_to_cell_ldof, a glue between coarse and fine lagrangian dofs for RedRefinementRules.
• Bugfix: Correct labeling of refined models.
• Bring fixes/changes from GridapP4est.jl#p4est-migration-exploring-non-conformity
• Implement generic version of get_d_to_face_to_parent_face
• Implement generic version of get_d_to_face_to_child_faces
• Bugfix: Allow domain limits to be floats in cartesian refinement routines.

[codecov-commenter]

Codecov Report

Merging #886 (39e0175) into master (6ce09af) will decrease coverage by 0.65%.
The diff coverage is 50.00%.

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@@            Coverage Diff             @@
##           master     #886      +/-   ##
==========================================
- Coverage   88.53%   87.89%   -0.65%     
==========================================
  Files         172      173       +1     
  Lines       20107    20398     +291     
==========================================
+ Hits        17802    17928     +126     
- Misses       2305     2470     +165     

Files Changed	Coverage Δ
src/Adaptivity/OldToNewFields.jl	0.00% <0.00%> (ø)
src/ReferenceFEs/ExtrusionPolytopes.jl	90.19% <ø> (ø)
src/Adaptivity/AdaptedTriangulations.jl	77.36% <28.57%> (-5.40%)	⬇️
src/Adaptivity/RefinementRules.jl	61.64% <37.50%> (-33.97%)	⬇️
src/Adaptivity/EdgeBasedRefinement.jl	89.17% <60.37%> (-4.67%)	⬇️
src/Adaptivity/AdaptivityGlues.jl	76.25% <65.33%> (-12.81%)	⬇️
src/Adaptivity/AdaptedDiscreteModels.jl	80.20% <68.75%> (-3.52%)	⬇️
src/Geometry/CartesianDiscreteModels.jl	99.61% <100.00%> (+<0.01%)	⬆️

... and 1 file with indirect coverage changes

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[JordiManyer]

@amartinhuertas Have a look at the concept version, experiment and check if it's indeed what you need. If so, I'll implement a generic version for any degree pair (p,2*p).
I leave a sketch of the toy model I'm using for the concept implementation:
DOF_glue.pdf

[JordiManyer]

Note that I can also produce very easily the inverse map, i.e for each coarse edge a vector containing the properly ordered dof ids of the fine edges below it.

[JordiManyer]

The CI errors are weird.... I have not touched that part of the code, and all tests pass locally.... Could this be a mistake in the master branch?

[JordiManyer]

For future reference, here are the refinement rules for HEX:

• White -> Child comes from vertex
• Blue -> Child comes from edge
• Red -> Child comes from face
• Green -> Child comes from cell