otellogr: Implement Error and comment Init

[scorpionknifes]

Implements remaining methods and adds to the changelog

Part of #5192

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.8%. Comparing base (f9d4025) to head (29fa319).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #6295   +/-   ##
=====================================
  Coverage   66.7%   66.8%           
=====================================
  Files        193     193           
  Lines      15565   15580   +15     
=====================================
+ Hits       10391   10414   +23     
+ Misses      4883    4877    -6     
+ Partials     291     289    -2     

Files with missing lines	Coverage Δ
bridges/otellogr/logsink.go	100.0% <100.0%> (+1.8%)	⬆️

... and 1 file with indirect coverage changes

[dmathieu]

You need to run go mod tidy.