add missing gc_collect() calls in sqlite3 tests (python#127446)

Author: cfbolz

Lib/test/test_sqlite3/test_regression.py

@@ -433,6 +433,7 @@ def test_table_lock_cursor_dealloc(self):
             con.commit()
             cur = con.execute("select t from t")
             del cur
+            support.gc_collect()
             con.execute("drop table t")
             con.commit()
 
@@ -448,6 +449,7 @@ def dup(v):
             con.create_function("dup", 1, dup)
             cur = con.execute("select dup(t) from t")
             del cur
+            support.gc_collect()
             con.execute("drop table t")
             con.commit()