JVM IR: remove dependency of 'backend.jvm' on 'psi2ir', 'ir.serialization.jvm'

Add a new module 'backend.jvm.entrypoint' which depends on psi2ir and
contains code that runs psi2ir + JVM IR backend with serialization
implementations.

Hopefully this will allow to compile these modules in parallel and
reduce the build time.

kotlin-native/backend.native/build.gradle

@@ -177,6 +177,7 @@ dependencies {
     compilerCompile project(":kotlin-util-klib")
     compilerCompile project(":kotlin-util-klib-metadata")
     compilerCompile project(":compiler:ir.serialization.common")
+    compilerCompile project(":compiler:ir.psi2ir")
     use(LocalDependenciesKt) {
         compilerCompile(intellijCoreDep()){
             artifact {