Vulkan : Fix maxVertexOutputComponents GL_MAX_VERTEX_OUTPUT_COMPONENTS should mirror Vulkan's reported maxVertexOutputComponents; this shouldn't include any gl_Position adjustments. It was previously set as maxVaryingVectors * 4. The workaround for AMD that reserved an extra varying due to driver instability is no longer required (see: https://chromium-review.googlesource.com/c/angle/angle/+/1980272) Bug: angleproject:4233 Change-Id: I8d7b8eafa7edd4c56005dad039fe69e072692fca Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1975851 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>