Split InvalidPackageDeclaration to create MissingPackageDeclaration

[BraisGabin]

InvalidPackageDeclaration was doing two different things. With this PR we split that responsability in two different rules.

I created the new rule MissingPackageDeclaration inside the error prone rule set, do you agree?

Closes #3957

[codecov]

Codecov Report

Merging #4149 (7057bfc) into main (f12697d) will increase coverage by 0.01%.
The diff coverage is 90.47%.

@@             Coverage Diff              @@
##               main    #4149      +/-   ##
============================================
+ Coverage     83.44%   83.46%   +0.01%     
- Complexity     3177     3179       +2     
============================================
  Files           465      466       +1     
  Lines          9104     9114      +10     
  Branches       1775     1775              
============================================
+ Hits           7597     7607      +10     
  Misses          572      572              
  Partials        935      935              

Impacted Files	Coverage Δ
...h/detekt/rules/naming/InvalidPackageDeclaration.kt	96.15% <87.50%> (+3.29%)	⬆️
...sch/detekt/rules/bugs/MissingPackageDeclaration.kt	90.90% <90.90%> (ø)
...etekt/generator/printer/defaultconfig/Exclusion.kt	96.77% <100.00%> (ø)
...turbosch/detekt/rules/bugs/PotentialBugProvider.kt	100.00% <100.00%> (ø)

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