Use --no-unlogged-table-data in t/027_stream_regress.pl.
This removes the need to drop unlogged relations in the src/test/regress
suite, like commit
dec8ad367e46180f826d5b6dc820fbecba1b71d2 did.
Reviewed by Thomas Munro.
Discussion: https://postgr.es/m/39945.
1650895508@sss.pgh.pa.us