[0.78] Correctly batch reportMount calls

[kagod-dev]

Target Branch(es)

0.78

Link to commit or PR to be picked

facebook/react-native#50090

Description

Original issue was fixed on main branch but didn't get into 0.78-stable.
I'm reporting this cherry-pick to not loose this fix.

[react-native-bot]

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[cipolleschi]

@react-native-bot merge e4d51cd8660c5853dad24d96b3594e72aea8c6d4 0.78-stable

[react-native-bot]

✅ Successfully picked up your commit facebook/react-native@e4d51cd on the branch https://github.com/facebook/react-native/commits/0.78-stable