Added missing pool locks in the VmaDefragmenterContext#529

JustSid wants to merge 1 commit intoGPUOpen-LibrariesAndSDKs:masterGPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator:masterfrom

JustSid:fix_defrag_raceJustSid/VulkanMemoryAllocator:fix_defrag_raceCopy head branch name to clipboard