Avoid database-wide VACUUM FULL in test case.

Vacuuming the single table ought to be enough.

src/test/regress/expected/bfv_statistic.out

@@ -379,7 +379,7 @@ NOTICE:  Table doesn't have 'DISTRIBUTED BY' clause -- Using column named 'c' as
 HINT:  The 'DISTRIBUTED BY' clause determines the distribution of data. Make sure column(s) chosen are the optimal data distribution key to minimize skew.
 INSERT INTO T25289_T2 VALUES (1);
 DELETE FROM T25289_T2;
-VACUUM FULL;
+VACUUM FULL T25289_T2;
 ANALYZE T25289_T2;
 DROP TABLE T25289_T2;
 --

src/test/regress/sql/bfv_statistic.sql

@@ -293,7 +293,7 @@ DROP TABLE IF EXISTS T25289_T2;
 CREATE TABLE T25289_T2 (c int);
 INSERT INTO T25289_T2 VALUES (1);
 DELETE FROM T25289_T2;
-VACUUM FULL;
+VACUUM FULL T25289_T2;
 ANALYZE T25289_T2;
 
 DROP TABLE T25289_T2;
@@ -321,4 +321,4 @@ WITH (APPENDONLY=ON) DISTRIBUTED BY (c)
 PARTITION BY RANGE(d) (START(1) END (100) EVERY(1));
 ANALYZE T25289_T4;
 
-DROP TABLE IF EXISTS T25289_T4;
\ No newline at end of file
+DROP TABLE IF EXISTS T25289_T4;