Added begin and end rendering commands #408

Job	Run time
linux: gcc, VulkanSDK latest, VMA=ON	1m 40s
linux: gcc, VulkanSDK latest, VMA=OFF	1m 39s
windows: msvc, VulkanSDK latest, VMA=ON	1m 31s
linux: gcc, VulkanSDK 1.2.176, VMA=OFF	1m 1s
windows: msvc, VulkanSDK latest, VMA=ON	1m 23s
windows: msvc, VulkanSDK latest, VMA=OFF	57s
windows: msvc, VulkanSDK 1.3.216.0, VMA=ON	55s
windows: msvc, VulkanSDK latest, VMA=OFF	1m 13s
windows: msvc, VulkanSDK 1.3.216.0, VMA=ON	1m 23s
windows: msvc, VulkanSDK 1.3.216.0, VMA=OFF	1m 0s
windows: msvc, VulkanSDK 1.2.198.1, VMA=ON	53s
windows: msvc, VulkanSDK 1.3.216.0, VMA=OFF	1m 4s
windows: msvc, VulkanSDK 1.2.198.1, VMA=ON	1m 5s
windows: msvc, VulkanSDK 1.2.198.1, VMA=OFF	1m 11s
windows: msvc, VulkanSDK 1.2.198.1, VMA=OFF	48s
	17m 43s

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