Paper: TextInput maxLength is not working in old arch (#48126)

Summary:
Fixes #47563

It seems like a regression from #45401, where it was aimed to fix `onChangeText` being called multiple times when changing the text programmatically in an input with the `multiline` prop set as true.

This PR reverts that partially, as the `maxLength` check is not being evaluated correctly before setting the text. Not reverting it completely as when removing the second part of the fix, the `onChangeText` gets called multiple times again.

## Changelog:

[IOS] [FIXED] - Fixing TextInput `maxLength` not working in old arch

Pull Request resolved: #48126

Test Plan:
The issue could be reproduced in the rn-tester. See my videos with the before and after the fix.

<details>
<summary>Before:</summary>

https://github.com/user-attachments/assets/86fd67eb-fc14-469a-a5f8-8e83b49f857c

</details>

<details>
<summary>After:</summary>

https://github.com/user-attachments/assets/368383b1-c1bd-4e0b-ac44-c78022462fa0

</details>

Reviewed By: cortinico

Differential Revision: D67025182

Pulled By: cipolleschi

fbshipit-source-id: 720c400eef362618106ae434aef421c7529214fe

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

@@ -476,7 +476,7 @@ - (NSString *)textInputShouldChangeText:(NSString *)text inRange:(NSRange)range
         _maxLength.integerValue - (NSInteger)backedTextInputView.attributedText.string.length + (NSInteger)range.length,
         0);
 
-    if (text.length > _maxLength.integerValue) {
+    if (text.length > allowedLength) {
       // If we typed/pasted more than one character, limit the text inputted.
       if (text.length > 1) {
         if (allowedLength > 0) {