Constraint reduction for inequalities with infinite RHS

[goulart-paul]

Implements a very basic constraint reduction mechanism to remove constraints in nonnegative cones with infinite RHSs, where "Clarabel.INFINITY" is a settable parameter at module level.

Fixes #85.
Prototype of fix for oxfordcontrol/Clarabel.rs#14

[codecov-commenter]

Codecov Report

Patch coverage: 96.19% and project coverage change: +0.59 🎉

Comparison is base (50b0c6e) 82.22% compared to head (875b182) 82.82%.

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Additional details and impacted files

@@              Coverage Diff               @@
##           dev/v0.5.0     #115      +/-   ##
==============================================
+ Coverage       82.22%   82.82%   +0.59%     
==============================================
  Files              37       38       +1     
  Lines            2701     2730      +29     
==============================================
+ Hits             2221     2261      +40     
+ Misses            480      469      -11     

Impacted Files	Coverage Δ
src/settings.jl	8.00% <ø> (ø)
src/variables.jl	77.64% <ø> (+11.64%)	⬆️
src/presolver.jl	88.23% <88.23%> (ø)
src/Clarabel.jl	100.00% <100.00%> (ø)
src/cones/compositecone_type.jl	94.59% <100.00%> (-0.28%)	⬇️
src/cones/cone_types.jl	93.44% <100.00%> (ø)
src/cones/coneops_compositecone.jl	87.64% <100.00%> (ø)
src/cones/coneops_nncone.jl	82.08% <100.00%> (+0.55%)	⬆️
src/info_print.jl	96.90% <100.00%> (+0.06%)	⬆️
src/kktsolvers/direct-ldl/directldl_utils.jl	88.78% <100.00%> (ø)
... and 4 more

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