Improve gradle plugin

[BraisGabin]

Align how we register all our tasks in our plugin.

And I renamed "oldDetekt" to "vanillaDetekt". The old is kind of missleading because is the only non-experimental way that we expose.

[codecov]

Codecov Report

Merging #3354 (377bd70) into master (25edc90) will decrease coverage by 0.01%.
The diff coverage is 90.00%.

@@             Coverage Diff              @@
##             master    #3354      +/-   ##
============================================
- Coverage     80.45%   80.43%   -0.02%     
- Complexity     2737     2740       +3     
============================================
  Files           447      448       +1     
  Lines          8287     8281       -6     
  Branches       1573     1573              
============================================
- Hits           6667     6661       -6     
  Misses          772      772              
  Partials        848      848              

Impacted Files	Coverage Δ	Complexity Δ
.../main/kotlin/io/gitlab/arturbosch/detekt/Detekt.kt	27.95% <ø> (ø)	19.00 <0.00> (ø)
...gitlab/arturbosch/detekt/internal/DetektAndroid.kt	71.87% <ø> (ø)	12.00 <0.00> (ø)
.../io/gitlab/arturbosch/detekt/internal/DetektJvm.kt	59.25% <ø> (ø)	5.00 <0.00> (ø)
...o/gitlab/arturbosch/detekt/internal/DetektPlain.kt	87.50% <87.50%> (ø)	5.00 <5.00> (?)
...kotlin/io/gitlab/arturbosch/detekt/DetektPlugin.kt	80.95% <100.00%> (-3.43%)	9.00 <1.00> (-2.00)

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[picklebento]

What do you think about the name typeNotResolvedDetekt over vanillaDetekt?

[cortinico]

Nice cleanup :)

[cortinico]

What do you think about the name typeNotResolvedDetekt over vanillaDetekt?

I'd be more for plainDetekt

[BraisGabin]

Sorry for the delay, renamed to Plain.