Compute D3-tadpole for family of G4-fluxes

[HereAround]

• Implement D3-tadpole for family of G4-fluxes.
• Serialize the D3-tadpole for special families of G4-fluxes.
• Support D3-tadpole also for individual G4-fluxes.
• General code improvements.
• Ensure that inter_dict is loaded in as Dict{NTuple{4, Int64}, ZZRingElem}.
• Use MPolyBuildCtx builder for creation of the tadpole polynomial.

cc @apturner @emikelsons

[fingolfin]

Ideally this should use the new @attr variant as in #4476

[HereAround]

I have an eye on it. Once the new @attr is available I am happy to update. (Am in fact looking forward to the adaptations made by @lgoettgens . Thx!)

[fingolfin]

Just a few quick comments. All optional, feel free to ignore

[codecov]

Codecov Report

Attention: Patch coverage is 43.93939% with 74 lines in your changes missing coverage. Please review.

Project coverage is 84.55%. Comparing base (9642ba2) to head (f33fe95).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...eoryTools/src/Serialization/hypersurface_models.jl	0.00%	19 Missing ⚠️
...ntal/FTheoryTools/src/Serialization/tate_models.jl	0.00%	19 Missing ⚠️
...heoryTools/src/Serialization/weierstrass_models.jl	0.00%	19 Missing ⚠️
...al/FTheoryTools/src/FamilyOfG4Fluxes/attributes.jl	74.54%	14 Missing ⚠️
...perimental/FTheoryTools/src/G4Fluxes/attributes.jl	80.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4487      +/-   ##
==========================================
+ Coverage   84.40%   84.55%   +0.14%     
==========================================
  Files         672      672              
  Lines       88737    88863     +126     
==========================================
+ Hits        74901    75134     +233     
+ Misses      13836    13729     -107     

Files with missing lines	Coverage Δ
...Tools/src/FamilyOfG4Fluxes/special_constructors.jl	77.11% <100.00%> (ø)
...perimental/FTheoryTools/src/G4Fluxes/properties.jl	100.00% <100.00%> (+1.53%)	⬆️
...perimental/FTheoryTools/src/G4Fluxes/attributes.jl	82.35% <80.00%> (-17.65%)	⬇️
...al/FTheoryTools/src/FamilyOfG4Fluxes/attributes.jl	75.86% <74.54%> (-24.14%)	⬇️
...eoryTools/src/Serialization/hypersurface_models.jl	46.09% <0.00%> (-7.55%)	⬇️
...ntal/FTheoryTools/src/Serialization/tate_models.jl	52.34% <0.00%> (-8.57%)	⬇️
...heoryTools/src/Serialization/weierstrass_models.jl	45.31% <0.00%> (-7.42%)	⬇️

... and 4 files with indirect coverage changes

[HereAround]

Just a few quick comments. All optional, feel free to ignore

Thank you! :)

[emikelsons]

Looks good and the tests pass.