Switch VGF backend from custom vulkan-headers-1.4.343 to standardized khronos (#19031) #4140

Job	Run time
test-arm / test-backend-linux (arm_tosa_fp, models) / linux-job	28m 56s
test-arm / test-backend-linux (arm_tosa_fp, operators) / linux-job	20m 28s
test-arm / test-backend-linux (arm_vgf_fp, models) / linux-job	30m 32s
test-arm / test-backend-linux (arm_vgf_fp, operators) / linux-job	20m 0s
test-arm / test-backend-macos	0s
test-arm / package-golden-artifacts	44s
	1h 40m 40s

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