Update to Kotlin 2.X

[jpnovais]

Description

Update to Kotlin 2.0.

The scope is to update the language version in gradle configs and fix any eventual compiler breaking changes to allow team/project to benefit for new version as soon as possible.

Motivation

• benefit from Koltin 2x new features. Release notes
• more performant compile
• Avoid writing new code in outdated version

Tasks

• Update Koltin compiler/versions in gradle configs
• Fix eventual breaking changes

Acceptance criteria

• Green end2end build
• Compile new version of Besu plugins and test integration