Add coverage for pipeline cache hit of active pipeline

Add coverage for pipeline cache hit of active pipeline

This CL adds coverage to the dEQP-VK.pipeline.creation_feedback.*
tests for the case where the newly created pipeline has
a cache hit of another pipeline that was created previously,
and that other pipeline is still open and active.

Previously the test only had coverage for pipeline cache
hit of previous pipelines that were destroyed. This adds
coverage for both scenarios.

Affects:

dEQP-VK.pipeline.creation_feedback.*

Components: Vulkan

VK-GL-CTS issue: 2032

Change-Id: I7320d0bf075ea430eafbcf6c3b2518b985c024b8