[scss] Display a wrong selector preview when using sibling combinators in SCSS, Less

Type: <b>Bug</b> When using both style nesting and sibling combinators (`+` and `~`) in SCSS or Less, VSCode will display a wrong selector preview. I've determined that this error also occurs when no extensions are running. For example, if writing a stylesheet like this: ```scss .foo + .bar { .baz & { color: red; } } ``` VSCode will display a wrong selector preview like this:  ```html <element class="foo"> <element class="baz"> … <element class="bar"> ``` Expect this: ```html <element class="baz"> … <element class="foo"> <element class="bar"> ``` Same when using `~`:  Expect this: ```html <element class="baz"> … <element class="foo"> ⋮ <element class="bar"> ``` ---- VS Code version: Code 1.74.2 (e8a3071ea4344d9d48ef8a4df2c097372b0c5161, 2022-12-20T10:29:14.590Z) OS version: Windows_NT x64 10.0.22621 Modes: Sandboxed: No <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i5-10210U CPU @ 1.60GHz (8 x 2112)| |GPU Status|2d_canvas: enabled<br>canvas_oop_rasterization: disabled_off<br>direct_rendering_display_compositor: disabled_off_ok<br>gpu_compositing: enabled<br>multiple_raster_threads: enabled_on<br>opengl: enabled_on<br>rasterization: enabled<br>raw_draw: disabled_off_ok<br>skia_renderer: enabled_on<br>video_decode: enabled<br>video_encode: enabled<br>vulkan: disabled_off<br>webgl: enabled<br>webgl2: enabled<br>webgpu: disabled_off| |Load (avg)|undefined| |Memory (System)|11.80GB (2.37GB free)| |Process Argv|--crash-reporter-id 76088c10-0186-42e8-9434-fc9aba83ae2a| |Screen Reader|no| |VM|0%| </details><details> <summary>A/B Experiments</summary> ``` vsliv368cf:30146710 vsreu685:30147344 python383:30185418 vspor879:30202332 vspor708:30202333 vspor363:30204092 vswsl4…