Fix checkExhaustiveness for formatting and third party rules

[cortinico]

Fixes #5790

Sadly, I couldn't test this due to how classloading works with our setup.
Perhaps we can merge it and test @TWiStErRob repo against the SNAPSHOT?

[codecov]

Codecov Report

Merging #5869 (3b58e2b) into main (c6d7acd) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main    #5869   +/-   ##
=========================================
  Coverage     84.57%   84.57%           
+ Complexity     3786     3785    -1     
=========================================
  Files           546      546           
  Lines         12938    12943    +5     
  Branches       2275     2274    -1     
=========================================
+ Hits          10942    10947    +5     
  Misses          862      862           
  Partials       1134     1134           

Impacted Files	Coverage Δ
.../detekt/core/config/validation/ConfigValidation.kt	91.93% <ø> (ø)
...e/config/validation/MissingRulesConfigValidator.kt	100.00% <100.00%> (ø)
...osch/detekt/generator/printer/DeprecatedPrinter.kt	100.00% <0.00%> (ø)

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[github-actions]

	Warnings
⚠️	It looks like this PR contains functional changes without a corresponding test.
⚠️	This PR is approved with no milestone set. If merged, it won't appear in the Detekt release notes.

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