Fix validation regarding cube map array dims When defining cube map array textures, the depth represents the number of layer-faces, and does not change with mip level. * Updated validation for glTexImage3D(). * The width and the height for a mip level should not exceed the max cube map size for that mip level. * The depth limit has been set to max 3D texture size (similar to glTexStorage3D()) * The spec states that this limit should be at least the value of the implementation-based constant MAX_RECTANGLE_TEXTURE_SIZE. * Added unit tests to check multiple cases for cube map array validation for TexStorage3D, TexImage3D, and TexSubImage3D. Bug: b/338621235 Bug: angleproject:42262247 Change-Id: I0857e68de02238ffd288e34879fb7dfa6e3f545f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5698571 Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.com> Reviewed-by: Charlie Lao <cclao@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>