chore(web): disable PBR when material has texture

[keiya01]

Overview

Before this change, texture was disappear when disabling PBR. So I fixed this issue.

Non-PBR with texture	PBR with texture

What I've done

What I haven't done

How I tested

const id = reearth.layers.add({
    type: "simple",
    data: {
        type: "3dtiles",
        url: "https://assets.cms.plateau.reearth.io/assets/e3/a75ee8-6621-48d4-97ee-d38d10b23677/13100_tokyo23-ku_2022_3dtiles_1_2_op_bldg_13101_chiyoda-ku_lod2/tileset.json",
    },
    "3dtiles": {
        pbr: false
    }
});
setTimeout(() => reearth.camera.flyTo(id), 100);

Which point I want you to review particularly

Memo

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9a1e322) 25.97% compared to head (73db9db) 25.98%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #875   +/-   ##
=======================================
  Coverage   25.97%   25.98%           
=======================================
  Files        1657     1657           
  Lines      183602   183621   +19     
  Branches     3895     3893    -2     
=======================================
+ Hits        47688    47711   +23     
+ Misses     134825   134821    -4     
  Partials     1089     1089           

Flag	Coverage Δ
web	24.31% <100.00%> (+0.01%)	⬆️
web-beta	24.31% <100.00%> (+0.01%)	⬆️
web-classic	24.31% <100.00%> (+0.01%)	⬆️
web-utils	24.31% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...sium/Shaders/CustomShaders/NonPBRLightingShader.ts	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

[pyshx]

LGTM.