[REQ] Kotlin clients add a new additional property to change the generated Jackson's ObjectMapper's FAIL_ON_UNKNOWN_PROPERTIES's value

[ashirman]

Is your feature request related to a problem? Please describe.

adds a new additional and non mandatory property to change the generated Jackson's ObjectMapper's FAIL_ON_UNKNOWN_PROPERTIES's value

Describe the solution you'd like

need to make changes similar to what was done in this PR to cover Kotlin generated sources.

Describe alternatives you've considered

Additional context

was asked open a ticket in this PR #19271 (comment) to align Java and Kotlin behaviour.

[fistons]

I will work on a PR to address this as soon as I can