Log Support for memorylimiter Processor

[keitwb]

This adds the ability to use the memorylimiter process in log pipelines.

[codecov]

Codecov Report

Merging #1291 into master will decrease coverage by 0.00%.
The diff coverage is 85.91%.

@@            Coverage Diff             @@
##           master    #1291      +/-   ##
==========================================
- Coverage   89.43%   89.42%   -0.01%     
==========================================
  Files         212      212              
  Lines       15038    15104      +66     
==========================================
+ Hits        13449    13507      +58     
- Misses       1158     1166       +8     
  Partials      431      431              

Impacted Files	Coverage Δ
obsreport/obsreport_receiver.go	100.00% <ø> (ø)
processor/metrics.go	78.44% <ø> (ø)
exporter/exportertest/sink_exporter.go	71.76% <52.94%> (-4.71%)	⬇️
exporter/exportertest/nop_exporter.go	94.73% <66.66%> (-5.27%)	⬇️
obsreport/obsreport.go	94.73% <100.00%> (+0.21%)	⬆️
obsreport/obsreport_processor.go	97.87% <100.00%> (+0.72%)	⬆️
processor/memorylimiter/factory.go	100.00% <100.00%> (ø)
processor/memorylimiter/memorylimiter.go	88.65% <100.00%> (+1.75%)	⬆️
translator/internaldata/resource_to_oc.go	86.04% <0.00%> (+2.32%)	⬆️

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