E2ETest failure: Padding doesn't work for Views on VS 2019, v142 tools, Release x64

[jonthysell]

As part of PR #4101, the measureLayout E2E test is failing on the windows-2019 VM because the View's padding is not being applied.

I've confirmed that it repros on my 19H1+ machine, when building in VS 2019 and the v142 toolset.

We are patching Yoga.cpp in vnext\DeforkingPatches\ReactCommon\yoga\yoga\Yoga.cpp to add an extra measure call, apparently for the benefit of react-native-win32, but it has the side effect of messing up react-native-windows.

Removing that patch fixes the issue for react-native-windows, but may cause other unintended side-effects in react-native-windows, and of course probably messes up react-native-win32.

[jonthysell]

Making things even weirder, this only seems to happen with release bits it's possible this is a debug/release issue.

[jonthysell]

This only repros on Release x64, not Release x86.

[acoates-ms]

To be clear this is unrelated to the win32 patch -- and just started with the new version of the compiler.

RNTester in playground app in Debug:

RNTester in playground app in Release: