Report NewLineAtEndOfFile source location at end of file

[3flex]

Fixes #4181

[codecov]

Codecov Report

Merging #4187 (ed9dde6) into main (e0fa7a3) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main    #4187   +/-   ##
=========================================
  Coverage     84.12%   84.13%           
  Complexity     3201     3201           
=========================================
  Files           467      467           
  Lines         10102    10108    +6     
  Branches       1773     1773           
=========================================
+ Hits           8498     8504    +6     
  Misses          673      673           
  Partials        931      931           

Impacted Files	Coverage Δ
...kotlin/io/gitlab/arturbosch/detekt/api/Location.kt	81.48% <ø> (ø)
...rturbosch/detekt/rules/style/NewLineAtEndOfFile.kt	100.00% <100.00%> (ø)

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