ktlint: Make ktlint & ktlintFormat incremental.

[vanniktech]

Part of #116

[codecov]

Codecov Report

Merging #118 into master will increase coverage by 0.47%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##             master    #118      +/-   ##
===========================================
+ Coverage     82.62%   83.1%   +0.47%     
  Complexity       84      84              
===========================================
  Files             2       2              
  Lines           213     219       +6     
  Branches         30      30              
===========================================
+ Hits            176     182       +6     
  Misses           25      25              
  Partials         12      12

Impacted Files	Coverage Δ	Complexity Δ
...h/code/quality/tools/CodeQualityToolsPlugin.groovy	82.79% <100%> (+0.49%)	84 <0> (ø)	⬇️

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