Introduce experimental -Xuse-javac compilation mode

In this mode, javac AST and Symbol files are used during
Kotlin compilation instead of PSI / binary stuff.
Later, they are reused for Java file compilation.
javac in this mode is integrated into kotlinc.

compiler/testData/compileKotlinAgainstJava/CyclicDependencies.kt

@@ -0,0 +1,13 @@
+package test
+
+class KotlinClass {
+    fun getKotlinClass() = KotlinClass()
+}
+
+class KotlinClass2 {
+    val str = "HELLO"
+}
+
+fun useJavaClass() = CyclicDependencies().apply {
+    useKotlinClass().let { useKotlinClass2(it) }
+}.let { it.useKotlinClass2(it.useKotlinClass()) }