Migrate to newer kotlin-metadata-jvm

[sandwwraith]

Currently (

binary-compatibility-validator/gradle/libs.versions.toml

Line 18 in 29a83d7

kotlinx-metadata = { module = "org.jetbrains.kotlinx:kotlinx-metadata-jvm", version = "0.6.2" }

) BCV uses kotlinx-metadata-jvm 0.6.2. This version uses some obsolete APIs, and it is recommended to migrate to the latest stable version with a different package. Moreover, it is required to be able to read Kotlin 2.1 language version (to which master branch of Kotlin will be switched soon).

Changleg and migration guide are available here:
https://github.com/JetBrains/kotlin/blob/75c87dd8585147b4abab2ac262fac84a037f07be/libraries/kotlinx-metadata/jvm/Migration.md#L1
https://github.com/JetBrains/kotlin/blob/75c87dd8585147b4abab2ac262fac84a037f07be/libraries/kotlinx-metadata/jvm/ChangeLog.md

[fzhinkin]

It's relatively easy to update the code (see update-metadata-lib branch), but kotlin-metadata-jvm:2.0.0 will bring transitive dependency on stdlib:2.0.0, so #208 needs to be done first.