Fix false positive for UnusedPrivateMember - Backtick identifiers

[cortinico]

Fixes #3825

[codecov]

Codecov Report

Merging #3828 (91b908c) into main (6abfd10) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #3828      +/-   ##
============================================
+ Coverage     83.47%   83.58%   +0.11%     
- Complexity     3104     3110       +6     
============================================
  Files           456      456              
  Lines          8937     8931       -6     
  Branches       1751     1748       -3     
============================================
+ Hits           7460     7465       +5     
+ Misses          559      551       -8     
+ Partials        918      915       -3     

Impacted Files	Coverage Δ
...turbosch/detekt/rules/style/UnusedPrivateMember.kt	91.30% <100.00%> (ø)
...bosch/detekt/generator/collection/Configuration.kt	100.00% <0.00%> (ø)
...enerator/printer/rulesetpage/RuleSetPagePrinter.kt	86.04% <0.00%> (ø)
...n/kotlin/io/github/detekt/report/html/HtmlUtils.kt	100.00% <0.00%> (+2.56%)	⬆️
.../io/gitlab/arturbosch/detekt/generator/out/Yaml.kt	68.96% <0.00%> (+10.34%)	⬆️
...ekt/generator/printer/rulesetpage/ConfigPrinter.kt	92.85% <0.00%> (+14.13%)	⬆️

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