Added offset support to draw_indexed, via const std::tuple<const buff… #416

Job	Run time
linux: gcc, VulkanSDK latest, VMA=ON	1m 2s
windows: msvc, VulkanSDK latest, VMA=ON	56s
linux: gcc, VulkanSDK latest, VMA=OFF	58s
windows: msvc, VulkanSDK latest, VMA=ON	1m 32s
windows: msvc, VulkanSDK latest, VMA=OFF	1m 11s
linux: gcc, VulkanSDK 1.2.176, VMA=OFF	1m 0s
windows: msvc, VulkanSDK latest, VMA=OFF	1m 31s
windows: msvc, VulkanSDK 1.3.216.0, VMA=ON	1m 10s
windows: msvc, VulkanSDK 1.3.216.0, VMA=ON	1m 8s
windows: msvc, VulkanSDK 1.3.216.0, VMA=OFF	55s
windows: msvc, VulkanSDK 1.3.216.0, VMA=OFF	1m 4s
windows: msvc, VulkanSDK 1.2.198.1, VMA=ON	1m 23s
windows: msvc, VulkanSDK 1.2.198.1, VMA=ON	1m 13s
windows: msvc, VulkanSDK 1.2.198.1, VMA=OFF	1m 9s
windows: msvc, VulkanSDK 1.2.198.1, VMA=OFF	53s
	17m 5s

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