Fully migrate Bitrise to GitHub Actions

Bitrise is set up in #214. Years have passed, and the ecosystem of GitHub Actions is getting stronger and faster, supporting more features. There are the same CPU cores on both Bitrise and GitHub devices, now it's time to migrate to GitHub actions completely.

Check

• Bitrise: https://scans.gradle.com/s/mue5ayj32owgy
• GitHub Actions: https://scans.gradle.com/s/gw6ikdulzk7yu

Part of GHA support has been finished in

• #3728
• #3904

With Gradle 8.6 and GBA v3, we can store CC data on CI, see

• https://docs.gradle.org/8.6/release-notes.html
• https://github.com/gradle/gradle-build-action/releases/tag/v3.0.0