nir: include texture query lod as one of the ops that requires a sampler

In practice we found that we need this for v3d (specifically for cube
map arrays, as they don't support the default value for wrap_i, so a
sampler object is needed to override that value).

It is worth to note that the main reason behind this auxiliar method
was to identify those cases that we didn't have a sampler object
available for Vulkan. So far, we found that we have a sampler object
coming from nir always for that operation.

Fixes cube map array tests like the following:
dEQP-VK.glsl.texture_functions.query.texturequerylod.usamplercubearray_fragment

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>

src/compiler/nir/nir.h

@@ -2152,7 +2152,6 @@ typedef struct {
     *    - nir_texop_txf
     *    - nir_texop_txf_ms
     *    - nir_texop_txs
-    *    - nir_texop_lod
     *    - nir_texop_query_levels
     *    - nir_texop_texture_samples
     *    - nir_texop_samples_identical
@@ -2177,7 +2176,6 @@ nir_tex_instr_need_sampler(const nir_tex_instr *instr)
    case nir_texop_txf:
    case nir_texop_txf_ms:
    case nir_texop_txs:
-   case nir_texop_lod:
    case nir_texop_query_levels:
    case nir_texop_texture_samples:
    case nir_texop_samples_identical: