Fix buffer RAW hazards in MultiQueue synchronization tests

Fix buffer RAW hazards in MultiQueue synchronization tests

The MultiQueue tests emit barriers between command buffers for two reasons:

1. To express the data dependencies between different pipeline stages.
2. To transfer ownership of the resource between queue families.

The exclusive sharing mode tests need both of these barriers, while the
concurrent mode tests only need to describe the data dependency.

Previously, a barrier was only emitted for the exclusive tests, causing
the concurrent tests to not have a barrier expressing the data dependencies
between the pipeline stages. Now the data dependencies are described for
both the exlusive and concurrent tests, while the ownership transfer is
only performed for exclusive tests.

Affects: dEQP-VK.synchronization.op.multi_queue.*.write_*_read_*.buffer_*

Components: Vulkan
VK-GL-CTS issue: 1650

Change-Id: Ic3bc83a7dcab8686754aea5267afeb10090038d0