chore(cubesql): Clean up unreferenced insta snapshots #4606

Job	Run time
Unit (Rewrite Engine) (CUBESQL_TOP_DOWN_EXTRACTOR=true)	9m 8s
Check fmt/clippy	2m 59s
Unit (Rewrite Engine) (CUBESQL_TOP_DOWN_EXTRACTOR=false)	8m 48s
Build macos-13 x86_64-apple-darwin 20.x with Python fallback	32m 9s
Build Linux GNU 20.x x86_64-unknown-linux-gnu with Python 3.9	12m 11s
Build macos-13 aarch64-apple-darwin 20.x with Python fallback	19m 20s
Build windows-2019 20.x with Python fallback	19m 54s
Build Linux GNU 20.x x86_64-unknown-linux-gnu with Python 3.10	12m 10s
Build Linux GNU 20.x x86_64-unknown-linux-gnu with Python 3.11	11m 49s
Build Linux GNU 20.x x86_64-unknown-linux-gnu with Python 3.12	11m 46s
Build Linux GNU 20.x x86_64-unknown-linux-gnu with Python fallback	11m 53s
Build Linux GNU 22.x x86_64-unknown-linux-gnu with Python 3.9	4m 47s
Build Linux GNU 22.x aarch64-unknown-linux-gnu with Python 3.9	11m 44s
Build Linux GNU 22.x x86_64-unknown-linux-gnu with Python 3.10	11m 41s
Build Linux GNU 22.x x86_64-unknown-linux-gnu with Python 3.11	11m 40s
Build Linux GNU 22.x x86_64-unknown-linux-gnu with Python 3.12	11m 55s
Build Linux GNU 22.x aarch64-unknown-linux-gnu with Python 3.12	11m 53s
Build Linux GNU 22.x x86_64-unknown-linux-gnu with Python fallback	11m 40s
Build Linux GNU 22.x aarch64-unknown-linux-gnu with Python fallback	11m 28s
	3h 58m 55s

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