Merge pull request #49263 from Calinou/add-occluder3d-editor-icons

Add editor icons for Occluder3D and OccluderInstance3D

editor/icons/Occluder3D.svg

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+<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><path d="m7.90625 1a7 7 0 0 0 -1.2988281.1386719 4.5 4.5 0 0 1 3.3925781 4.3613281 4.5 4.5 0 0 1 -4.5 4.5 4.5 4.5 0 0 1 -4.359375-3.3886719 7 7 0 0 0 -.140625 1.3886719 7 7 0 0 0 7 7 7 7 0 0 0 7-7 7 7 0 0 0 -7-7 7 7 0 0 0 -.09375 0z" fill="#ffca5f" stroke-width=".365215"/></svg>

editor/icons/OccluderInstance3D.svg

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+<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><path d="m7.90625 1a7 7 0 0 0 -1.2988281.1386719 4.5 4.5 0 0 1 3.3925781 4.3613281 4.5 4.5 0 0 1 -4.5 4.5 4.5 4.5 0 0 1 -4.359375-3.3886719 7 7 0 0 0 -.140625 1.3886719 7 7 0 0 0 7 7 7 7 0 0 0 7-7 7 7 0 0 0 -7-7 7 7 0 0 0 -.09375 0z" fill="#fc7f7f" fill-opacity=".996078" stroke-width=".365215"/></svg>