Check bindingContext only once in MemberNameEqualsClassName

[schalkms]

This change simplifies the MemberNameEqualsClassName rule.
For a class/function pair the bindingContext check happens once.

[codecov]

Codecov Report

Merging #3899 (44534f9) into main (703487e) will increase coverage by 0.00%.
The diff coverage is 40.00%.

@@            Coverage Diff            @@
##               main    #3899   +/-   ##
=========================================
  Coverage     83.54%   83.55%           
+ Complexity     3119     3118    -1     
=========================================
  Files           456      456           
  Lines          8974     8973    -1     
  Branches       1746     1746           
=========================================
  Hits           7497     7497           
+ Misses          565      564    -1     
  Partials        912      912           

Impacted Files	Coverage Δ
...h/detekt/rules/naming/MemberNameEqualsClassName.kt	84.21% <40.00%> (+2.15%)	⬆️

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