Consolidate datafusion/sqllogictest/test_files/cte_quoted_reference.slt

[alamb]

Since this test is small, I think we can consolidate it into cte.slt. Maybe in next PR.

Originally posted by @jonahgao in #19519 (comment)

[alamb]

This is probably a good first issue as it would introduce a contributor to sqllogictests and the CI process

[AnjaliChoudhary99]

hi please assign it to me. @alamb

[AnjaliChoudhary99]

I've submitted a PR to address this issue: PR #19862 .