Include Kotlin multiplatform test folders to default exclude configuration

[Whathecode]

The default-detekt-config.yml has several default 'excludes' configurations to exclude test sources.

excludes: '**/test/**,**/androidTest/**,**/*.Test.kt,**/*.Spec.kt,**/*.Spek.kt'

However, this does not cover test folders in Kotlin multiplatform projects, which are named **/<platform-target>Test/**, e.g., **/jsTest/** and **/commonTest/**. I reuse the majority of defaults, but using detekt in a multiplatform project requires me to override all default excludes with my own:

excludes: '**/commonTest/**,**/jvmTest/**,**/jsTest/**,**/test/**'

Therefore, it would be nice to either add the default multiplatform test folders to default-detekt-config.yml, or alternatively, to override the 'default' excludes in one place.

[Whathecode]

Maybe **/*Test/**, or would that be too broad?

[BraisGabin]

'**/test/**' is already too broad... adding **/*Test/** doesn't seem like a huge change. This will help to android and it's flavours. Where the tests of a flavour are placed in **/flavourTest/**.

Any way, I think thatsomthing like #2581 would be really handy for your use case too.

[schalkms]

I think adding **/commonTest/**,**/jvmTest/**,**/jsTest/**,**/iosTest/** makes more sense, since this is really common in Kotlin multi-platform.
If everyone agrees, I'll submit a PR.

[Whathecode]

@schalkms I tried making a PR before but couldn't find the sources to modify. :) I presumed that default file was generated?

[schalkms]

One needs to edit 1 file and 1 unit test. The .yml file is auto-generated. I modified the 2 files quickly and submitted the PR.