Disable anonymous functions in gluings

[HechtiDerLachs]

This is some independent work carried out on #4110 .

It removes the anonymous functions inside the LazyGluings. These are not necessary and they don't serialize nicely. So I took them out.

In the course of this I disabled the possibility to "cheaply" compute only the gluing domains. This turned out not to be useful and it just made things more complicated.

[HechtiDerLachs]

Tests seem to pass, but the booktests. But that looks rather like a hickup, doesn't it?

[codecov]

Codecov Report

Attention: Patch coverage is 63.33333% with 11 lines in your changes missing coverage. Please review.

Project coverage is 84.65%. Comparing base (9575e9a) to head (e4a7628).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
...metry/Schemes/PrincipalOpenSubset/Objects/Types.jl	0.00%	10 Missing ⚠️
...braicGeometry/Schemes/Gluing/LazyGluing/Methods.jl	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4111      +/-   ##
==========================================
- Coverage   84.67%   84.65%   -0.02%     
==========================================
  Files         626      626              
  Lines       83980    83983       +3     
==========================================
- Hits        71108    71100       -8     
- Misses      12872    12883      +11     

Files with missing lines	Coverage Δ
experimental/Schemes/src/Auxiliary.jl	94.20% <100.00%> (ø)
...perimental/Schemes/src/CoveredProjectiveSchemes.jl	88.30% <100.00%> (ø)
...y/Schemes/CoveredSchemes/Morphisms/Constructors.jl	95.45% <100.00%> (ø)
...Geometry/Schemes/CoveredSchemes/Objects/Methods.jl	94.70% <100.00%> (ø)
...raicGeometry/Schemes/Covering/Morphisms/Methods.jl	98.64% <100.00%> (ø)
...ebraicGeometry/Schemes/Covering/Objects/Methods.jl	81.19% <100.00%> (+0.08%)	⬆️
...gebraicGeometry/Schemes/Gluing/LazyGluing/Types.jl	100.00% <100.00%> (ø)
src/AlgebraicGeometry/Schemes/Gluing/Methods.jl	95.52% <100.00%> (ø)
.../AlgebraicGeometry/Schemes/Sheaves/IdealSheaves.jl	80.49% <100.00%> (ø)
...Geometry/ToricVarieties/ToricSchemes/attributes.jl	67.39% <100.00%> (ø)
... and 2 more

... and 1 file with indirect coverage changes

[afkafkafk13]

Thank you! Makes sense and does the job!