clean up qrchol LHS setup and use a better heuristic for sqrt hess oracles

[chriscoey]

No description provided.

[codecov]

Codecov Report

Merging #737 (7496f34) into master (385a9c5) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #737      +/-   ##
==========================================
+ Coverage   97.28%   97.30%   +0.01%     
==========================================
  Files          53       53              
  Lines        7915     7896      -19     
==========================================
- Hits         7700     7683      -17     
+ Misses        215      213       -2     

Impacted Files	Coverage Δ
src/Cones/epipersepspectral/epipersepspectral.jl	100.00% <ø> (ø)
src/Cones/epirelentropy.jl	98.79% <ø> (+0.39%)	⬆️
src/Cones/hypogeomean.jl	99.36% <ø> (-0.01%)	⬇️
src/Cones/hypoperlog.jl	99.48% <ø> (-0.01%)	⬇️
src/Cones/hypoperlogdettri.jl	99.57% <ø> (-0.01%)	⬇️
src/Cones/hyporootdettri.jl	99.49% <ø> (+0.49%)	⬆️
src/Cones/wsosinterpepinormone.jl	99.66% <ø> (-0.01%)	⬇️
src/Cones/Cones.jl	97.24% <100.00%> (+0.02%)	⬆️
src/Cones/epinormeucl.jl	98.38% <100.00%> (ø)
src/Cones/epinorminf.jl	97.88% <100.00%> (ø)
... and 6 more

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