delegate as many GLMM properties as possible to internal LMM

[palday]

@dmbates is there a giant footgun I'm missing by swapping to "delegate by default" instead of "delegate by explicit list"?

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.93%. Comparing base (c4beee9) to head (484d33b).

Additional details and impacted files

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##             main     #767      +/-   ##
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- Coverage   96.93%   96.93%   -0.01%     
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  Files          34       34              
  Lines        3358     3356       -2     
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- Hits         3255     3253       -2     
  Misses        103      103              

Flag	Coverage Δ
current	96.87% <100.00%> (-0.01%)	⬇️
minimum	96.77% <100.00%> (-0.07%)	⬇️
nightly	96.43% <100.00%> (-0.01%)	⬇️

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[dmbates]

Seems reasonable to me. The only footgun I can imagine is if there is a property of an LMM that wouldn't make sense for a GLMM, like σ, but all of those seem to be handled in earlier elseif blocks.