refactor: simplify sqlx fail fast ping and simplify miniredis setup in test (#2897)

* chore(redistest): simplify miniredis setup in test

* refactor(sqlx): simplify sqlx fail fast ping

* chore: close connection if not available

core/stores/sqlx/sqlconn_test.go

@@ -52,14 +52,11 @@ func TestSqlConn(t *testing.T) {
 }
 
 func buildConn() (mock sqlmock.Sqlmock, err error) {
-	_, err = connManager.GetResource(mockedDatasource, func() (io.Closer, error) {
+	connManager.GetResource(mockedDatasource, func() (io.Closer, error) {
 		var db *sql.DB
 		var err error
 		db, mock, err = sqlmock.New()
-		return &pingedDB{
-			DB: db,
-		}, err
+		return db, err
 	})
-
 	return
 }