[Kotlin] Primitive array items validity check

[andreas-umbricht]

Description

I opened an issue about that here where I explain the issue in more details. Essentially the validateJsonElement() function should also check if an array of primitives are in fact primitives. This check was missing before.

The check that I implemented does not validate if a list of strings is in fact a list of strings or a list of floats is in fact a list of floats. The check only distinguishes between primitives and non-primitives.
For our business-needs this fix should be already enough and can be expanded for more precise implementation.

@dr4ke616 @karismann @Zomzog @andrewemery @4brunu @stefankoppier @e5l

[wing328]

thanks for the pr

please follow step 3 to update the samples so that ci can verify the result

[wing328]

ci failure not related to this pr

let's give it a try

thanks for the contribution