Add regression test for sass/dart-sass#2208 #1409

Job	Run time
Language \| Dart Sass \| Dart stable	1m 0s
JS API \| Pure JS \| Browser	1m 18s
Language \| Dart Sass \| Dart dev	1m 5s
JS API \| Embedded \| Node lts/* \| ubuntu-latest	4m 32s
JS API \| Pure JS \| Node lts/* \| ubuntu-latest	1m 15s
JS API \| Embedded \| Node lts/* \| windows-latest	7m 11s
JS API \| Pure JS \| Node lts/* \| windows-latest	3m 36s
Lint spec files	17s
JS API \| Embedded \| Node lts/* \| macos-latest	7m 21s
Static analysis	21s
JS API \| Pure JS \| Node lts/* \| macos-latest	3m 2s
JS API \| Embedded \| Node lts/-1 \| ubuntu-latest	4m 56s
JS API \| Pure JS \| Node lts/-1 \| ubuntu-latest	1m 18s
JS API \| Embedded \| Node lts/-2 \| ubuntu-latest	4m 48s
JS API \| Pure JS \| Node lts/-2 \| ubuntu-latest	1m 30s
Unit tests	37s
JS API \| Embedded \| Node lts/-3 \| ubuntu-latest	5m 21s
JS API \| Pure JS \| Node lts/-3 \| ubuntu-latest	1m 26s
	50m 54s

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