Vulkan: Fix render-to-texture simultaneously bound to two FBOs If a texture is simultaneously attached to two FBOs, one where it's a normal texture and another where it's multisampled-render-to-texture, different render targets must be created for it. If a texture is simultaneously attached to two FBOs, both as multisampled-render-to-texture but with different sample counts, two implicit multisampled images need to be created as well as different render targets. Bug: angleproject:4913 Change-Id: I584ba327e4cb2099ef62f86f5d88719dc156ce13 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2335810 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>