Combine Only and Never Evaluator

[CodingDepot]

The Only- and Never-Evaluators have a lot of overlap in their logic, which makes sense regarding their very similar purpose.
However, this also causes them to use duplicated code to achieve the same result.

Furthermore, over time slight differences in the implementations emerged which makes it increasingly annoying to implement changes for both Evaluators.
For example, the Only-Evalutor created a pass-Finding for each valid call while the Never-Evaluator did not.
Combining both evaluators makes it more easy to keep the functionality synchronized while still allowing for smaller differences depending on the chosen functionality.

This PR also includes an example for a new functionality for both Evaluators. Each finding generated by a Never- or Only- Evaluator will now include usages of the code as relatedLocations.

[codecov]

Codecov Report

Attention: Patch coverage is 89.65517% with 3 lines in your changes missing coverage. Please review.

Project coverage is 77.46%. Comparing base (d0c45be) to head (f137a7a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
.../codyze/backends/cpg/coko/dsl/ImplementationDsl.kt	83.33%	0 Missing and 2 partials ⚠️
...backends/cpg/coko/evaluators/OnlyNeverEvaluator.kt	93.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #875      +/-   ##
============================================
- Coverage     77.58%   77.46%   -0.12%     
+ Complexity      273      263      -10     
============================================
  Files            61       60       -1     
  Lines          1972     1966       -6     
  Branches        280      282       +2     
============================================
- Hits           1530     1523       -7     
  Misses          313      313              
- Partials        129      130       +1     

Flag	Coverage Δ
unittests	77.46% <89.65%> (-0.12%)	⬇️

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