* Fix Java not compiled in kotlin-gradle-plugin Kotlin source set
* Fix the integration tests running under Java 6
* Fix kotlin-gradle-subplugin-example not being installed -- needed
for a test
* Fix Android tests being always excluded
* Move versions out of `build.gradle` (x2) to a common `versions.gradle`
* Move JDK, dist and bootstrap to `commonConfiguration.gradle`
* Build `kotlin-gradle-plugin` with JDK_18
* Add gradle-tools subproject
* Add Gradle buildscripts to the related projects
* Remove the projects from the libraries pom.xml
* Move AndroidGradleWrapper.groovy to separate source root
* Changed artifact dependencies to project dependencies where needed
* Extract common configuration into commonConfiguration.gradle
* (convert functions to closures to be able to call them)
* Refactor DSL usage
* Replace `project.properties` with `findProperty`
* Unify Gradle wrapper between `libraries` and `gradle-tools`
(as a temporary solution, just made the wrapper files the same)
It was added for Android extensions, but now another mechanism is used there
(PackageFragmentProviderExtension), and there were no other implementations of
ExternalDeclarationsProvider in the project
Writing source annotations enables incremental compilation for kapt2.
However they are not needed in bytecode, so we remove them when
copying classes.
# Conflicts:
# compiler/cli/src/org/jetbrains/kotlin/cli/jvm/K2JVMCompiler.kt
# compiler/frontend.java/src/org/jetbrains/kotlin/config/JVMConfigurationKeys.java
Sergey Igushkin