zink: clear textures directly when possible
now that overhead for resuming renderpasses has been made mostly nonexistent, this is by far the better option and cuts cpu usage by ~90% in some cases, e.g., tomb raider benchmark
now that overhead for resuming renderpasses has been made mostly nonexistent, this is by far the better option and cuts cpu usage by ~90% in some cases, e.g., tomb raider benchmark