Fix typo in the illegal 3D texture assert logic. We care about catching
arrayed 3D textures or 3D shadow textures, not regular 3D textures.

- Minor perf improvement.

 Please enter the commit message for your changes. Lines starting

Co-Authored-By: Mat M. <mathew1800@gmail.com>

Layered framebuffer attachments is a feature that allows applications to
write attach layered textures to a single attachment. What layer the
fragments are written to is decided from the shader using gl_Layer.

SPIR-V's Layer is GLSL's gl_Layer. It lets the application choose from a
shader stage (vertex, tessellation or geometry) which framebuffer layer
write the output fragments to.

Code before this commit was trying to match 3D textures with another
target. Fix that.

Implement downloads to guest memory from texture buffers on the generic
cache and OpenGL.

402: function name should be Initialize2 (7.0.0+) not SetOperationMode
Follow by: https://switchbrew.org/wiki/LDN_services#IUserLocalCommunicationService