This was featurized as a workaround for Intel/Windows drivers that did
not render flipped in comparison to GL per Vulkan spec.  This issue has
long since been fixed, and due to missing parentheses the feature was
accidentally unconditionally true for a long time already.

Bug: angleproject:4896
Change-Id: I1db55d298bd47df649ff1f03d287d0cfa7453ea7
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2372632Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>