Vulkan: Add check for int8 extension support Vulkan backend currently has a check for float16 part in VK_KHR_shader_float16_int8 extension. Add the int8 support as well. The changes in below files are generated through `scripts/run_code_generation.py` script - include/platform/autogen/FeaturesVk_autogen.h - util/autogen/angle_features_autogen.cpp - util/autogen/angle_features_autogen.h Bug: angleproject:360031000 Change-Id: I8811779299e3d24b4536d1871e1eadcbb87432c2 Signed-off-by: Gowtham Tammana <g.tammana@samsung.com> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5792021 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>