Vulkan: Implement EXT_depth_clamp Bug: angleproject:8047 Change-Id: I73244f5dcd6eeeb1889214ee3a611e4ecabbfe7e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4558744 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>