UseDataClass: fix false positive on value classes

[cortinico]

Fixes #4010

[codecov]

Codecov Report

Merging #4016 (fdafabc) into main (2271906) will increase coverage by 0.01%.
The diff coverage is 33.33%.

❗ Current head fdafabc differs from pull request most recent head 02ada28. Consider uploading reports for the commit 02ada28 to get more accurate results

@@             Coverage Diff              @@
##               main    #4016      +/-   ##
============================================
+ Coverage     83.53%   83.55%   +0.01%     
- Complexity     3179     3181       +2     
============================================
  Files           459      459              
  Lines          9082     9083       +1     
  Branches       1772     1771       -1     
============================================
+ Hits           7587     7589       +2     
  Misses          561      561              
+ Partials        934      933       -1     

Impacted Files	Coverage Δ
...gitlab/arturbosch/detekt/generator/out/Markdown.kt	21.42% <0.00%> (ø)
.../io/gitlab/arturbosch/detekt/generator/out/Yaml.kt	68.57% <0.00%> (ø)
...rbosch/detekt/rules/bugs/ImplicitUnitReturnType.kt	86.66% <66.66%> (+3.33%)	⬆️
...tlab/arturbosch/detekt/rules/style/UseDataClass.kt	77.94% <100.00%> (+0.32%)	⬆️

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