Update Kotlin to 1.9.0 (#3074)

* Update Kotlin Gradle Plugin to 1.9.0

* Update Android Gradle Plugin to 4.2.2

* Introduce convention plugin for Gradle runner

https://github.com/gradle/gradle/issues/8301

* Fix unit test `common, jvm and macos source sets with kotlin multiplatform`

* Update compiler to 1.9.0

* Update integration test

* Add empty target for WASM integration test to avoid single target project

See https://github.com/Kotlin/dokka/issues/3038

* Remove unused `plugins.shadow` from toml

1 files changed, 4 insertions, 2 deletions

diff --git a/runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/kotlin/kotlinClasspathUtils.kt b/runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/kotlin/kotlinClasspathUtils.kt
index e05b2075..b534dcc4 100644
--- a/runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/kotlin/kotlinClasspathUtils.kt
+++ b/runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/kotlin/kotlinClasspathUtils.kt
@@ -55,8 +55,10 @@ private fun KotlinCompilation.classpathOf(project: Project): FileCollection {
 
     val shouldKeepBackwardsCompatibility = (kgpVersion != null && kgpVersion < KotlinGradlePluginVersion(1, 7, 0))
     return if (shouldKeepBackwardsCompatibility) {
-        @Suppress("DEPRECATION_ERROR")
-        kotlinCompile.classpath // deprecated with error since 1.8.0, left for compatibility with < Kotlin 1.7
+        // removed since 1.9.0, left for compatibility with < Kotlin 1.7
+        val classpathGetter= kotlinCompile::class.members
+            .first { it.name == "getClasspath" }
+        classpathGetter.call(kotlinCompile) as FileCollection
     } else {
         kotlinCompile.libraries // introduced in 1.7.0
     }