PLS: Validate mip level bindings are within base/max range It is undefined behavior for imageLoad/imageStore to access a mipmap level outside the effective base/max range. Since PLS may be implemented with shader images, we need to require that the mip level bindings on active planes are within this range. Bug: angleproject:40096838 Change-Id: I539016d94db161f1af0ae1bd496a123b78fb51dd Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6382273 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Alexey Knyazev <lexa.knyazev@gmail.com> Commit-Queue: Chris Dalton <chris@rive.app>