Remove cache from BridgeOptimizer

[blegat]

This removes the need for the @bridge macro but now bridges need to implement getters from ConstraintFunction and ConstraintSet if they want to getter to work for the bridge optimizer.

Closes #713

[codecov-io]

Codecov Report

Merging #722 into master will increase coverage by 0.28%.
The diff coverage is 95.73%.

@@            Coverage Diff             @@
##           master     #722      +/-   ##
==========================================
+ Coverage   93.83%   94.11%   +0.28%     
==========================================
  Files          54       54              
  Lines        5677     5746      +69     
==========================================
+ Hits         5327     5408      +81     
+ Misses        350      338      -12

Impacted Files	Coverage Δ
src/Bridges/scalarizebridge.jl	53.12% <ø> (ø)	⬆️
src/Bridges/intervalbridge.jl	86.84% <100%> (+6.28%)	⬆️
src/Bridges/slackbridge.jl	95.16% <100%> (+0.33%)	⬆️
src/Bridges/functionize_bridge.jl	97.5% <100%> (+7.84%)	⬆️
src/Bridges/quadtosocbridge.jl	97.26% <100%> (+3.81%)	⬆️
src/Utilities/functions.jl	92% <100%> (+0.13%)	⬆️
src/Bridges/lazybridgeoptimizer.jl	97.43% <100%> (ø)	⬆️
src/Test/contlinear.jl	100% <100%> (ø)	⬆️
src/Utilities/universalfallback.jl	98.13% <100%> (-0.04%)	⬇️
src/Bridges/Bridges.jl	100% <100%> (ø)	⬆️
... and 14 more

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