2b/3 Update hostmetrics load scraper to use new perfcounters package

[james-bebbington]

Link to tracking Issue: #973

Description:
 1. Add new perflib package
 2. Migrate host metrics scrapers to use new package
 3. Remove third_party PDH code

Depends on #1835

[codecov]

Codecov Report

Merging #1868 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1868      +/-   ##
==========================================
+ Coverage   91.23%   91.28%   +0.04%     
==========================================
  Files         272      272              
  Lines       16263    16263              
==========================================
+ Hits        14838    14846       +8     
+ Misses        998      993       -5     
+ Partials      427      424       -3     

Impacted Files	Coverage Δ
...ceiver/hostmetricsreceiver/hostmetrics_receiver.go	83.83% <0.00%> (-2.03%)	⬇️
translator/internaldata/resource_to_oc.go	91.48% <0.00%> (+4.25%)	⬆️
...ssor/tailsamplingprocessor/idbatcher/id_batcher.go	100.00% <0.00%> (+18.18%)	⬆️

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