RenderingDeviceVulkan: Make draw command labels thread safe

[sakrel]

This PR fixes the following thread safety validation errors triggered during the TPS demo loading screen:

UNASSIGNED-Threading-MultipleThreads(ERROR / SPEC): msgNum: 337425955 - Validation Error: [ UNASSIGNED-Threading-MultipleThreads ] Object 0: handle = 0x2382a729190, type = VK_OBJECT_TYPE_COMMAND_POOL; | MessageID = 0x141cb623 | THREADING ERROR : vkCmdBeginDebugUtilsLabelEXT(): object of type VkCommandPool is simultaneously used in thread 5064 and thread 16372

UNASSIGNED-Threading-MultipleThreads(ERROR / SPEC): msgNum: 337425955 - Validation Error: [ UNASSIGNED-Threading-MultipleThreads ] Object 0: handle = 0x2382ab2e5f0, type = VK_OBJECT_TYPE_COMMAND_POOL; | MessageID = 0x141cb623 | THREADING ERROR : vkCmdPipelineBarrier(): object of type VkCommandPool is simultaneously used in thread 16372 and thread 5064

Thread 16372 is the main thread
Thread 5064 is a resource loader thread

Bugsquad edit: Fixes #51955

[clayjohn]

Great catch! These should definitely be made thread safe as they can get called from many different places and so are bound to be called from multiple threads

[akien-mga]

Thanks!