Fix project issues list and counting (#33594) (#33619)

Backport #33594 by lunny

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

tests/integration/project_test.go

@@ -78,7 +78,7 @@ func TestMoveRepoProjectColumns(t *testing.T) {
 
 	columnsAfter, err := project1.GetColumns(db.DefaultContext)
 	assert.NoError(t, err)
-	assert.Len(t, columns, 3)
+	assert.Len(t, columnsAfter, 3)
 	assert.EqualValues(t, columns[1].ID, columnsAfter[0].ID)
 	assert.EqualValues(t, columns[2].ID, columnsAfter[1].ID)
 	assert.EqualValues(t, columns[0].ID, columnsAfter[2].ID)