Replace ReadOnly/Mutable usages in the compiler

Replace ones from org.jetbrains.kotlin package with new annotations from kotlin.annotations.jvm.
No need to copy them to compile kotlin-reflect anymore.
Then simplify reflect project more: no sources — no need to pack its direct output.

compiler/frontend/build.gradle.kts

@@ -7,6 +7,7 @@ plugins {
 jvmTarget = "1.6"
 
 dependencies {
+    compile(project(":kotlin-annotations-jvm"))
     compile(project(":core:descriptors"))
     compile(project(":core:deserialization"))
     compile(project(":compiler:util"))