Added QueryPool object.

Fixes all tests in:
dEQP-VK.api.object_management.*.query_pool

Change-Id: Ie564848b616714c39961e7a80bc421ec7bb0ef58
Reviewed-on: https://swiftshader-review.googlesource.com/c/23948Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Corentin Wallez <cwallez@google.com>