Update to react-native 0.72

[acoates-ms]

Platforms Impacted

• iOS
• macOS
• win32 (Office)
• windows
• android

Description of changes

Mostly bumping package versions.
Modified a few types that were using number|string for dimensions. In RN these types now use ${number}% instead of string, so we need our types to be similarly restrictive.

Heavy rewrite of the stack components. Switched it to use the newer gap properties. Also substantially reduced the valid values of some of its properties. Many of the value it was trying to use never worked in RN. (Setting padding to "5 10" doesn't work in RN), nor do the "calc" values.

Verification

Build/test. Built the win32 bundle and launched the test app.

Before	After
Screenshot or description before this change	Screenshot or description with this change

Pull request checklist

This PR has considered (when applicable):

• Automated Tests
• Documentation and examples
• Keyboard Accessibility
• Voiceover
• Internationalization and Right-to-left Layouts