mesa: make glFramebuffer* check immutable texture level bounds

mesa: make glFramebuffer* check immutable texture level bounds

When a texture is immutable, we can't tack on extra levels
after-the-fact like we could with glTexImage. So check against that
level limit and return an error if it's surpassed.

This fixes:
KHR-GL45.geometry_shader.layered_fbo.fb_texture_invalid_level_number

(Based on a patch by Ilia Mirkin.)

Reviewed-by: Antia Puentes <apuentes@igalia.com> [imirkin v2]
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>