Speed up hierarchy traversal, part 2

Speed up hierarchy traversal, part 2

Some of the tests do premature heavy work during test hierarchy
traversal, meaning that they waste time regardless of whether the tests
are run or not. These changes move some of that work to later stage of
test run, or otherwise speed things up a bit.

Affects:

dEQP-VK.pipeline.stencil.*
dEQP-VK.synchronization.cross_instance.*
dEQP-VK.synchronization.op.multi_queue.*
dEQP-VK.transform_feedback.fuzz.*

Components: Vulkan

VK-GL-CTS issue: 1830

Change-Id: I1c124cbf17068e56375ef2e467036e959cde8aa4
(cherry picked from commit 41527af467623bae596b2bd319b0694c11f8cbf8)