Add global log package

[MrAlias]

Resolve #5084

Building out logging bridges will require some global logging package to reference similar to what exists when the log package becomes stable. Similar to what we did for the metric signal, add a log/global package that implements a global logging provider.

[codecov]

Codecov Report

Attention: Patch coverage is 96.42857% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 83.6%. Comparing base (12c5651) to head (8242eca).

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #5085   +/-   ##
=====================================
  Coverage   83.5%   83.6%           
=====================================
  Files        244     247    +3     
  Lines      16029   16085   +56     
=====================================
+ Hits       13399   13453   +54     
- Misses      2342    2344    +2     
  Partials     288     288           

Files	Coverage Δ
log/internal/global/log.go	100.0% <100.0%> (ø)
log/internal/global/state.go	100.0% <100.0%> (ø)
log/global/log.go	66.6% <66.6%> (ø)