vulkan: Implement of a bunch of VkCommandPool functions

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14917>

src/vulkan/runtime/vk_command_buffer.h

@@ -25,6 +25,7 @@
 #define VK_COMMAND_BUFFER_H
 
 #include "vk_object.h"
+#include "util/list.h"
 #include "util/u_dynarray.h"
 
 #ifdef __cplusplus
@@ -41,6 +42,16 @@ struct vk_command_buffer {
    /** VkCommandBufferAllocateInfo::level */
    VkCommandBufferLevel level;
 
+   /** Link in vk_command_pool::command_buffers if pool != NULL */
+   struct list_head pool_link;
+
+   /** Destroys the command buffer
+    *
+    * Used by the common command pool implementation.  This function MUST
+    * call vk_command_buffer_finish().
+    */
+   void (*destroy)(struct vk_command_buffer *);
+
    /**
     * VK_EXT_debug_utils
     *