Was previously setting the global g_debugAnnotator class to
DebugAnnoatorVk, and only when a desktop environment variable or
Android setting indicated to.  Setting to DebugAnnoatorVk was equated
with a desire to generate Vulkan debug markers.

Will now set g_debugAnnotator to the generic LoggingAnnotator class
when Vulkan debug markers are not needed.  That will enable VVL errors
to again cause dEQP tests to fail.

Bug: angleproject:5291
Bug: angleproject:5304
Change-Id: Ib9169037423dd9de3f799e77f7f47468eeeeac20
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2518168Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>