JPS: Fix JvmMultifileClass processing for IR backend

#KT-44644 Fixed

jps-plugin/testData/incremental/withJava/other/multifileDependantUsage/partB.kt

@@ -0,0 +1,10 @@
+@file:JvmName("Utils")
+@file:JvmMultifileClass
+
+val bVal: Int get() = 0
+
+class OuterClass{
+    inner class InnerClass {
+        val getZero: Int get() = 0
+    }
+}