CL/VK: Cosmetic kernel arg updates - Move POD argument buffer init to kernel-init - Remove unused CLKernelVK members/types - Switch inside of setArg loop - Rename kernel members that best aligns to their resources Bug: angleproject:42267001 Change-Id: I837ceeceaf1ff903b67b7f100298d4a3159b97d7 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6220895 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Austin Annestrand <a.annestrand@samsung.com> Reviewed-by: Geoff Lang <geofflang@chromium.org>