Extract supertypes resolution into a separate FIR phase

idea/testData/fir/multiModule/mppSuperTypes/jvm/jvm.kt

@@ -24,4 +24,4 @@ class D : A() {
         bar()
         baz()
     }
-}
+}

idea/tests/org/jetbrains/kotlin/idea/fir/AbstractFirMultiModuleResolveTest.kt

@@ -106,11 +106,11 @@ abstract class AbstractFirMultiModuleResolveTest : AbstractMultiModuleTest() {
         }
 
         val transformer = FirTotalResolveTransformer()
+        transformer.processFiles(firFiles)
         for (file in firFiles) {
-            transformer.processFile(file)
             val firFileDump = StringBuilder().also { file.accept(FirRenderer(it), null) }.toString()
             val expectedPath = expectedTxtPath((file.psi as PsiFile).virtualFile)
             KotlinTestUtils.assertEqualsToFile(File(expectedPath), firFileDump)
         }
     }
-}
+}