Upgrade to Gradle 8.0

[yeikel]

Creating a task to track this effort

https://docs.gradle.org/8.0/release-notes.html

@oshai Feel free to assign it to me :)

[oshai]

Contribution is welcome!

[oshai]

Created initial PR in #323

[severn-everett]

@oshai I've created a new PR for this task that will bring Gradle up-to-date along with some other dependency updates

[oshai]

Thanks!