We were never destructing VkQueues, but were freeing the underlying memory.

Bug: b/133127573
Change-Id: Id6d9f615428073adad7267dd1bd48ced17f1b433
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/31592Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>