[Pressable] Mouse drags inside Pressable don't move the window

[Saadnajmi]

WIP, there's still some test code laying around.

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

When you host RN inside a window with a movable background, we don't want clicks inside Buttons/Controls/Pressables to move the window. We instead want to be able to click and drag off the Button to "cancel" the mouse interaction.This matches native Appkit controls. There's a convenient prop on NSView to do this, mouseDownCanMoveWindow, let's just expose it to React Native and set it to false on Pressable (the closest thing we have to an NSControl subclass in JS land).

Changelog

[MACOS] [FIXED] - Mouse drags inside Pressable don't move the window

Test Plan

Made RNTester's window movable via [self.window setMovableByWindowBackground:YES]; inside AppDelegate.mm. I then tested dragging the window from inside and outside a Pressable. I compared this to the behavior of dragging NSSwitch (one of the native controls exposed by RN).

Screen.Recording.2023-06-20.at.10.58.04.AM.mov