Disable javadoc generation on local development

Currently Dokka tasks running for Gradle plugins take quite a lot of
time slowing down local development cycle.

This change disables publishing javadoc on non-CI builds. This could be
lifted by putting 'kotlin.build.gradle.publish.javadocs=true' into
local.properties.

^KT-49227 In Progress

buildSrc/src/main/kotlin/BuildPropertiesExt.kt

@@ -51,3 +51,6 @@ val KotlinBuildProperties.isNativeRuntimeDebugInfoEnabled: Boolean
 
 val KotlinBuildProperties.junit5NumberOfThreadsForParallelExecution: Int?
     get() = (getOrNull("kotlin.test.junit5.maxParallelForks") as? String)?.toInt()
+
+val KotlinBuildProperties.publishGradlePluginsJavadoc: Boolean
+    get() = getBoolean("kotlin.build.gradle.publish.javadocs", false)

buildSrc/src/main/kotlin/GradleCommon.kt

@@ -100,9 +100,15 @@ fun Project.configureGradlePluginCommonSettings() {
                 .extensions
                 .configure<JavaPluginExtension> {
                     withSourcesJar()
+                    // Enabling publishing docs jars only on CI build
+                    // Currently dokka task runs non-incrementally and takes big amount of time
+                    if (kotlinBuildProperties.publishGradlePluginsJavadoc ||
+                        kotlinBuildProperties.isTeamcityBuild
+                    ) {
                         withJavadocJar()
                     }
                 }
+        }
 
         plugins.withId("org.jetbrains.dokka") {
             val dokkaTask = tasks.named<DokkaTask>("dokkaJavadoc")