Move common configuration from /build.gradle.kts into plugin

Move all common to all projects configuration from root build.gradle.kts
into common-configuration convention plugin.

compiler/fir/build.gradle.kts

@@ -19,7 +19,7 @@ val projectsAllowedToUseFirFromSymbol = listOf(
 
 subprojects {
     if (name in projectsAllowedToUseFirFromSymbol) {
-        tasks.withType<org.jetbrains.kotlin.gradle.dsl.KotlinCompile<*>> {
+        tasks.withType<org.jetbrains.kotlin.gradle.dsl.KotlinCompile<*>>().configureEach {
             kotlinOptions {
                 freeCompilerArgs += "-opt-in=org.jetbrains.kotlin.fir.symbols.SymbolInternals"
             }

compiler/fir/tree/build.gradle.kts

@@ -46,9 +46,9 @@ val generateTree by tasks.registering(NoDebugJavaExec::class) {
     systemProperties["line.separator"] = "\n"
 }
 
-val compileKotlin by tasks
-
-compileKotlin.dependsOn(generateTree)
+tasks.named("compileKotlin") {
+    dependsOn(generateTree)
+}
 
 if (kotlinBuildProperties.isInJpsBuildIdeaSync) {
     apply(plugin = "idea")