Drop RCT_EXPORT_METHOD from RCTActionSheetManager TurboModule (#57673)

Summary:

Changelog: [Internal]

`RCTActionSheetManager` is a TurboModule: it conforms to `NativeActionSheetManagerSpec` and implements `getTurboModule:` returning the codegen'd `...SpecJSI`. For TurboModules, the JS->ObjC dispatch is driven by codegen (the generated spec supplies the `selector` and argument kinds, invoked at runtime via `NSMethodSignature` / `NSInvocation`), not by the `RCT_EXPORT_METHOD` macro's `__rct_export__` metadata.

The exported methods here are async-void with concrete parameter types (no generic `id` requiring `RCTConvert` coercion), so the macro is not functionally required. Convert them to plain ObjC method declarations; conformance to the codegen'd `NativeActionSheetManagerSpec` protocol keeps compiler-enforced signature parity.

Signature-only refactor with no change to the JS-facing API. Sync methods, methods with `id` params, and `constantsToExport` are intentionally left untouched.

Differential Revision: D113579871

Author: christophpurrer

packages/react-native/React/CoreModules/RCTActionSheetManager.mm

@@ -76,9 +76,8 @@ - (void)presentViewController:(UIViewController *)alertController
   [parentViewController presentViewController:alertController animated:YES completion:nil];
 }
 
-RCT_EXPORT_METHOD(
-    showActionSheetWithOptions : (JS::NativeActionSheetManager::SpecShowActionSheetWithOptionsOptions &)
-        options callback : (RCTResponseSenderBlock)callback)
+- (void)showActionSheetWithOptions:(JS::NativeActionSheetManager::SpecShowActionSheetWithOptionsOptions &)options
+                          callback:(RCTResponseSenderBlock)callback
 {
   if (RCTRunningInAppExtension()) {
     RCTLogError(@"Unable to show action sheet from app extension");
@@ -219,7 +218,7 @@ - (void)presentViewController:(UIViewController *)alertController
   });
 }
 
-RCT_EXPORT_METHOD(dismissActionSheet)
+- (void)dismissActionSheet
 {
   if (_alertControllers.count == 0) {
     RCTLogWarn(@"Unable to dismiss action sheet");
@@ -232,10 +231,10 @@ - (void)presentViewController:(UIViewController *)alertController
   });
 }
 
-RCT_EXPORT_METHOD(
-    showShareActionSheetWithOptions : (JS::NativeActionSheetManager::SpecShowShareActionSheetWithOptionsOptions &)
-        options failureCallback : (RCTResponseSenderBlock)failureCallback successCallback : (RCTResponseSenderBlock)
-            successCallback)
+- (void)showShareActionSheetWithOptions:
+            (JS::NativeActionSheetManager::SpecShowShareActionSheetWithOptionsOptions &)options
+                        failureCallback:(RCTResponseSenderBlock)failureCallback
+                        successCallback:(RCTResponseSenderBlock)successCallback
 {
   if (RCTRunningInAppExtension()) {
     RCTLogError(@"Unable to show action sheet from app extension");