vk_scheduler: Prevent DispatchWork stalls

* Now that Finish no longer depends on the queue being empty of not we can move the chunk execution out of the work_mutex scope

src/video_core/renderer_vulkan/vk_scheduler.cpp

@@ -72,7 +72,6 @@ void Scheduler::WorkerThread(std::stop_token stop_token) {
     Common::SetCurrentThreadName("VulkanWorker");
     do {
         std::unique_ptr<CommandChunk> work;
-        bool has_submit{false};
         {
             std::unique_lock lock{work_mutex};
             if (work_queue.empty()) {
@@ -84,10 +83,9 @@ void Scheduler::WorkerThread(std::stop_token stop_token) {
             }
             work = std::move(work_queue.front());
             work_queue.pop();
-
-            has_submit = work->HasSubmit();
-            work->ExecuteAll(current_cmdbuf);
         }
+        const bool has_submit = work->HasSubmit();
+        work->ExecuteAll(current_cmdbuf);
         if (has_submit) {
             AllocateWorkerCommandBuffers();
         }

src/video_core/renderer_vulkan/vk_scheduler.h

@@ -213,7 +213,6 @@ private:
     std::mutex work_mutex;
     std::mutex queue_mutex;
     std::condition_variable_any work_cv;
-    std::condition_variable wait_cv;
     std::jthread worker_thread;
     bool use_worker_thread;
 };