Review bundled dependencies from #559

[jmfayard]

We want to do small and fast PR but that was not the case of #559 who grew to be too big and stale. So I merged it and created this issue so that @LouisCAD can check a posteriori whether the following dependencies are OK

• Jetbrains.exposed.*
• Ktor2.*
• KotlinX.lincheck.*
• KotlinX.multik.*
• KotlinX.dataframe.*
• KotlinX.deeplearning.*
• Koin.navigation
• Kotlinx.dataframe
• Testing.cucumber
• Testing.assertj
• Testing.jsonAssert
• Testing.powermock
• Testing.restAssured

[jmfayard]

• [ ] Arrow: review if missing dependencies https://search.maven.org/search?q=a:arrow-stack
• [x] KotlinX: remove dataframe.gradlePlugin
• [x] KotlinX: remove import
• [x] Spring: remove boms.springclmoud
• [x] Square.okhttp3: move comments to Kdoc
• [x] Ktor: remove Ktor1 vs Ktor2, use built-in mechanism, add this comment // TODO: Migrate to ktor2. See https://ktor.io/docs/migrating-2.html
• [x] ~Testing.kotest.kotestExtensions => move to kotestProperty and check if version is the same for both dependencies. I think it's not~ Wasn't exactly that, but should be handled now.
• [x] Remove val jsonAssert = DependencyNotation("org.skyscreamer", "jsonassert")
• [x] Remove Testing.cucumber because too many dependencies/versions available at https://search.maven.org/search?q=g:io.cucumber
• [x] Remove Testing.powermock

Not for now

• [ ] How to handle third party DN like for Ktor2 plugins?

[LouisCAD]

I think Ktor2 version key rules were also forgotten. I'm adding them back.