[0.63] Pull in Pressable onMouseEnter/onMouseLeave changes from #855

[Saadnajmi]

Please select one of the following

• I am removing an existing difference between facebook/react-native and microsoft/react-native-macos 👍
• I am cherry-picking a change from Facebook's react-native into microsoft/react-native-macos 👍
• I am making a fix / change for the macOS implementation of react-native
• I am making a change required for Microsoft usage of react-native

Summary

Pull in the changes from #855 into our 0.63-stable branch

Changelog

[macOS] [Fixed] - Pressable onMouseEnter/onMouseLeave callbacks not firing

Test Plan

[pull-bot]

	Warnings
⚠️	❔ Base Branch - The base branch for this PR is something other than master. Are you sure you want to merge these changes into a stable release? If you are interested in backporting updates to an older release, the suggested approach is to land those changes on master first and then cherry-pick the commits into the branch for that release. The Releases Guide has more information.

Generated by 🚫 dangerJS against 93e429a