Tests leaking parquet files

[hawkfish]

What happens?

If you run the unit or allunit test suites, they leave behind two parquet files: many_ints.parquet and stats.parquet

To Reproduce

$ rm *.parquet
$ make unit; make allunit
$ ls *.parquet

Environment (please complete the following information):

• OS: [OSX]
• DuckDB Version: [0.32-dev]
• DuckDB Client: [zsh]

Before Submitting

• Have you tried this on the latest master branch?

• Python: pip install duckdb --upgrade --pre
• R: install.packages("https://github.com/duckdb/duckdb/releases/download/master-builds/duckdb_r_src.tar.gz", repos = NULL)
• Other Platforms: You can find binaries here or compile from source.

• Have you tried the steps to reproduce? Do they include all relevant data and configuration? Does the issue you report still appear there?