[FIR] Reorganize modules of raw fir builders

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/genericFunctions.kt

@@ -0,0 +1,7 @@
+interface Any
+
+inline fun <reified T : Any> Any.safeAs(): T? = this as? T
+
+abstract class Summator {
+    abstract fun <T> plus(first: T, second: T): T
+}