Allow to enable and disable progress logging globally

[devmotion]

This PR moves the setprogress! logic from Turing upstream. IMO it belongs here since it allows to tune the default keyword arguments. The change is non-breaking since the default is not changed and it can be specified in the sample/mcmcsample calls as before.

Some additional background: The main reason for mcmcsample is that Turing wants to use different default keyword arguments for sample but I guess it might be better to allow to set or define the keyword arguments instead. E.g., by adding an additional default_chain_type(model, sampler) = Any function that could be implemented as default_chain_type(::Model, ::Sampler{<:InferenceAlgorithm}) = Chain in Turing.

[codecov[bot]]

Codecov Report

Merging #59 (8c9db50) into master (7e0967a) will decrease coverage by 0.39%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #59      +/-   ##
==========================================
- Coverage   98.68%   98.28%   -0.40%     
==========================================
  Files           6        6              
  Lines         152      175      +23     
==========================================
+ Hits          150      172      +22     
- Misses          2        3       +1     

Impacted Files	Coverage Δ
src/sample.jl	99.10% <100.00%> (+0.08%)	:arrow_up:
src/logging.jl	95.00% <0.00%> (-5.00%)	:arrow_down:
src/transducer.jl	100.00% <0.00%> (ø)
src/interface.jl	95.00% <0.00%> (+2.14%)	:arrow_up:

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[cpfiffer]

I'm all for it, thanks!