Support Kotlin 2.3.0

[hfhbd]

Description of the issue
Kotlin 2.3.0-Beta1 was released on 2025-10-07: https://github.com/JetBrains/kotlin/releases/tag/v2.3.0-Beta1
Kotlin 2.3.0 was released on 2025-12-16: https://github.com/JetBrains/kotlin/releases/tag/v2.3.0

CodeQL does not support Kotlin 2.3.0 yet, due to changes in the Kotlin compiler plugin api.

[hvitved]

Hi 👋

Thank for reporting this; it is already on our radar, but I cannot give you a timeline at this point, I'm afraid.

[forketyfork]

Looks like the work is being done in #20965, referencing it for transparency.