fix (iOS): fix selectTextOnFocus in Fabric and non-Fabric by calling selectAll after becomeFirstResponder (#44307)

Summary:
Fixes https://github.com/facebook/react-native/issues/41988

Hopefully even if this isn't the right way to go about solving this, it at least points in the right direction for a different fix!

Currently - both on Paper and Fabric - the `selectTextOnFocus` prop does not work as expected on a single line text input. It seems that if the `UITextField` has not yet become the first responder, the text will be briefly selected but then deselected immediately afterward.

This can be seen in the tester when running for either Fabric or Paper (video using Fabric)

https://github.com/facebook/react-native/assets/153161762/aa9c609e-6eb8-4177-a41f-32aae53c06ac

Instead, we can move the `selectAll` call to `reactFocus` in `RCTBaseTextInputView` or `focus` `RCTTextInputComponentView` - both of which first call `becomeFirstResponder` - to get the expected result.

## Changelog:

[IOS] [FIXED] - fix selectTextOnFocus in Fabric and non-Fabric by calling selectAll after becomeFirstResponder

Pull Request resolved: https://github.com/facebook/react-native/pull/44307

Test Plan:
* Test changes on RN Tester (iOS)

 https://pxl.cl/55kDc

Reviewed By: cipolleschi

Differential Revision: D56699773

Pulled By: fabriziocucci

fbshipit-source-id: ed092835f3c602e2c50a4198357653a9cef942d9

packages/react-native/Libraries/Text/TextInput/RCTBaseTextInputView.mm

@@ -375,14 +375,6 @@ RCT_NOT_IMPLEMENTED(-(instancetype)initWithFrame : (CGRect)frame)
 
 - (void)textInputDidBeginEditing
 {
-  if (_clearTextOnFocus) {
-    self.backedTextInputView.attributedText = [NSAttributedString new];
-  }
-
-  if (_selectTextOnFocus) {
-    [self.backedTextInputView selectAll:nil];
-  }
-
   [_eventDispatcher sendTextEventWithType:RCTTextEventTypeFocus
                                  reactTag:self.reactTag
                                      text:[self.backedTextInputView.attributedText.string copy]
@@ -600,6 +592,14 @@ RCT_NOT_IMPLEMENTED(-(instancetype)initWithFrame : (CGRect)frame)
 - (void)reactFocus
 {
   [self.backedTextInputView reactFocus];
+
+  if (_clearTextOnFocus) {
+    self.backedTextInputView.attributedText = [NSAttributedString new];
+  }
+
+  if (_selectTextOnFocus) {
+    [self.backedTextInputView selectAll:nil];
+  }
 }
 
 - (void)reactBlur

packages/react-native/React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputComponentView.mm

@@ -280,18 +280,6 @@ static NSSet<NSNumber *> *returnKeyTypesSet;
 
 - (void)textInputDidBeginEditing
 {
-  const auto &props = static_cast<const TextInputProps &>(*_props);
-
-  if (props.traits.clearTextOnFocus) {
-    _backedTextInputView.attributedText = nil;
-    [self textInputDidChange];
-  }
-
-  if (props.traits.selectTextOnFocus) {
-    [_backedTextInputView selectAll:nil];
-    [self textInputDidChangeSelection];
-  }
-
   if (_eventEmitter) {
     static_cast<const TextInputEventEmitter &>(*_eventEmitter).onFocus([self _textInputMetrics]);
   }
@@ -431,6 +419,18 @@ static NSSet<NSNumber *> *returnKeyTypesSet;
 - (void)focus
 {
   [_backedTextInputView becomeFirstResponder];
+
+  const auto &props = static_cast<const TextInputProps &>(*_props);
+
+  if (props.traits.clearTextOnFocus) {
+    _backedTextInputView.attributedText = nil;
+    [self textInputDidChange];
+  }
+
+  if (props.traits.selectTextOnFocus) {
+    [_backedTextInputView selectAll:nil];
+    [self textInputDidChangeSelection];
+  }
 }
 
 - (void)blur