Vulkan: Add commandQueueWaitSemaphoresTotal perf counter This counts total number of wait semaphores we submitted. This will be used to write test to ensure that we insert wait semaphores properly in future CLs. Bug: b/275624771 Change-Id: I5b8e209500ff553617f6b30c2f8b4626d29c0e6a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4400823 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Yuxin Hu <yuxinhu@google.com> Commit-Queue: Charlie Lao <cclao@google.com>