Refactor Analyzer so that RuleSetProvider.instance is only called once

[chao2zhang]

As we are still conforming to single branch development. This is a resubmission of #3555 as it was reverted.

[codecov]

Codecov Report

Merging #3585 (861df84) into master (091dc91) will decrease coverage by 0.01%.
The diff coverage is 85.71%.

@@             Coverage Diff              @@
##             master    #3585      +/-   ##
============================================
- Coverage     77.53%   77.52%   -0.02%     
  Complexity     2835     2835              
============================================
  Files           464      464              
  Lines          8779     8779              
  Branches       1720     1720              
============================================
- Hits           6807     6806       -1     
- Misses         1046     1047       +1     
  Partials        926      926              

Impacted Files	Coverage Δ	Complexity Δ
...otlin/io/gitlab/arturbosch/detekt/core/Analyzer.kt	80.26% <71.42%> (-0.82%)	9.00 <0.00> (ø)
...io/gitlab/arturbosch/detekt/core/rules/RuleSets.kt	100.00% <100.00%> (ø)	0.00 <0.00> (ø)

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