nir/lower_tex: fix number of components in replace_gradient_with_lod()

We should make the dest in the textureLod() operation have the same number
of components as the destination in the original textureGrad()

Fixes regression in ES3-CTS.gtf.GL3Tests.shadow

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99072
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
1 file changed