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.

compiler/tests-compiler-utils/build.gradle.kts

@@ -23,6 +23,7 @@ dependencies {
     testCompile(project(":compiler:cli-js"))
     testCompile(project(":compiler:serialization"))
     testCompile(project(":compiler:fir:entrypoint"))
+    testCompile(project(":compiler:backend.jvm:backend.jvm.entrypoint"))
     testCompile(projectTests(":compiler:test-infrastructure-utils"))
     testCompile(project(":kotlin-preloader"))
     testCompile(commonDep("com.android.tools:r8"))