pgsql: Use older name for test_primary_datadir

Use older name for test_primary_datadir Releases prior to 14 used the older naming scheme. This fixes a bug un the back-patches of 6ee26c6a4b in releases 12 and 13. Branch -- REL_13_STABLE Details --- https://git.postgresql.org/pg/commitdiff/4c1422553bf4e1435c02a57a161c7e58f5aa9c04 Mo

pgsql: Use older name for test_primary_datadir

Use older name for test_primary_datadir Releases prior to 14 used the older naming scheme. This fixes a bug un the back-patches of 6ee26c6a4b in releases 12 and 13. Branch -- REL_12_STABLE Details --- https://git.postgresql.org/pg/commitdiff/c944bf2f07f26aff9fcdfb8f4bf0e4973daeac54 Mo