Build: implement useBootstrapStdlib flag

Excludes stdlib projects from build and uses bootstrap stdlib artifacts

 #KT-29205

libraries/tools/kotlin-annotation-processing/build.gradle.kts

@@ -11,7 +11,7 @@ plugins {
 val packedJars by configurations.creating
 
 dependencies {
-    compile(project(":kotlin-stdlib"))
+    compile(kotlinStdlib())
     packedJars(project(":kotlin-annotation-processing")) { isTransitive = false }
     runtime(projectRuntimeJar(":kotlin-compiler-embeddable"))
 }