IR: refactor resolveFakeOverride call sites

Split it to 4 functions for clarity: resolveFakeOverride,
resolveFakeOverrideOrFail, resolveFakeOverrideMaybeAbstract,
resolveFakeOverrideMaybeAbstractOrFail. Remove/inline duplicated
utilities and remove unused parameters.

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGen.kt

@@ -307,7 +307,7 @@ internal fun KotlinStubs.generateObjCCall(
         receiver: ObjCCallReceiver,
         arguments: List<IrExpression?>
 ) = builder.irBlock {
-    val resolved = method.resolveFakeOverride(allowAbstract = true)?: method
+    val resolved = method.resolveFakeOverrideMaybeAbstract() ?: method
     val isDirect = directSymbolName != null
 
     val exceptionMode = ForeignExceptionMode.byValue(

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/CodeGenerator.kt

@@ -306,7 +306,7 @@ internal object VirtualTablesLookup {
 }
 
 internal fun IrSimpleFunction.findOverriddenMethodOfAny() =
-    resolveFakeOverride(allowAbstract = false).takeIf { it?.parentClassOrNull?.isAny() == true }
+    resolveFakeOverride().takeIf { it?.parentClassOrNull?.isAny() == true }
 
 /*
  * Special trampoline function to call actual virtual implementation. This helps with reducing

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objcexport/ObjCExportCodeGenerator.kt

@@ -1533,7 +1533,7 @@ private fun ObjCExportCodeGenerator.itablePlace(irFunction: IrSimpleFunction): C
     assert(irFunction.isOverridable)
     val irClass = irFunction.parentAsClass
     return if (irClass.isInterface
-            && (irFunction.isReal || irFunction.resolveFakeOverride(allowAbstract = true)?.parent != context.irBuiltIns.anyClass.owner)
+            && (irFunction.isReal || irFunction.resolveFakeOverrideMaybeAbstract()?.parent != context.irBuiltIns.anyClass.owner)
     ) {
         context.getLayoutBuilder(irClass).itablePlace(irFunction)
     } else {

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InteropLowering.kt

@@ -1088,7 +1088,7 @@ private class InteropTransformer(
         builder.at(expression)
         val function = expression.symbol.owner
 
-        if ((function as? IrSimpleFunction)?.resolveFakeOverride(allowAbstract = true)?.symbol
+        if ((function as? IrSimpleFunction)?.resolveFakeOverrideMaybeAbstract()?.symbol
                 == symbols.interopNativePointedRawPtrGetter) {
 
             // Replace by the intrinsic call to be handled by code generator: