[0.74] (iOS) Fix for RCTReloadCommand to allow bundle URL to be set properly

[douglowder]

Target Branch(es)

0.74

Link to commit or PR to be picked

facebook/react-native#44130

Description

This fixes an issue where RCTReloadCommand appears to allow a bundle URL to be set before reload, but in fact setting a bundle URL has no effect.
This may be a regression, as it was possible in 0.73 to reload with a different bundle URL, and this is working correctly on 0.74 in Android.
This fix is also needed to fix a problem with the expo-updates package.

[douglowder]

Closing this, see comments in the PR.