Ampli.kt should not use deprecated `clazz.newInstance()`

[MarcinVaadin]

Expected Behavior

Generated code should not use deprecated methods

Current Behavior

Generated code (Kotlin): val ingestionMetadata = clazz.newInstance()

Possible Solution

Replace with val ingestionMetadata = clazz.getDeclaredConstructor().newInstance()

Steps to Reproduce

1. generate Kotlin client using latest ampli

Environment

• AmplI: @amplitude/ampli/1.35.0 darwin-arm64 node-v21.7.1

[MarcinVaadin]

Please move to Amplitude-Kotlin repository