fix: added showSoftInputFocus handling for iOS new architecture

[shubhamguptadream11]

Summary:

Fixes: https://github.com/facebook/react-native/issues/45297

In iOS New Architecture When we are passing showSoftInputOnFocus prop to TextInput as false it should prevent soft keyboard from showing. Here, the problem is in Fabric counterpart of TextInput, there we are not handling showSoftInputOnFocus props anywhere.

Changelog:

Test Plan:

Below is the screen recording of fix made.

https://github.com/facebook/react-native/assets/85783070/de94877a-f684-4f8d-9ec4-a16f9755663e