XL button is massive in size

### Description

Using `xl` for button size renders a massive, unusable button

### CodeSandbox/Snack link

https://snack.expo.dev/4GoHFlL30

### Steps to reproduce

1. Create a `` element with `size='xl'`
2. See that the button is massive


### NativeBase Version

3.4.25

### Platform

- [ ] Android
- [ ] CRA
- [X] Expo
- [X] iOS
- [ ] Next

### Other Platform

_No response_

### Additional Information

_No response_

Start with the linked Expo Snack and reproduce the issue using a Button with size='xl' on iOS. Read the button sizing implementation and existing size-related tests, if present, to determine why xl renders excessively large. Done means xl produces a usable button without regressing other button sizes.

Written by the indexing model from the issue text.