[Build] Make JVM target settings logic less imperative

Previously actual value was dependent on the order of calls to `updateJvmTarget` and `configureJava9Compilation` in build script that may lead to inconsistencies

buildSrc/src/main/kotlin/JvmToolchain.kt

@@ -143,11 +143,18 @@ fun JavaCompile.configureTaskToolchain(
 fun Project.updateJvmTarget(
     jvmTarget: String
 ) {
-    tasks.withType<KotlinCompile>().configureEach {
+    // Java 9 tasks are exceptions that are configured in configureJava9Compilation
+    tasks
+        .withType<KotlinCompile>()
+        .matching { it.name != "compileJava9Kotlin" }
+        .configureEach {
             kotlinOptions.jvmTarget = jvmTarget
         }
 
-    tasks.withType<JavaCompile>().configureEach {
+    tasks
+        .withType<JavaCompile>()
+        .matching { it.name != "compileJava9Java" }
+        .configureEach {
             sourceCompatibility = jvmTarget
             targetCompatibility = jvmTarget
         }