Fix flaky test by being more permissive with the error message in TestOverallQueryTimeout (vitessio#18299)

Signed-off-by: Manan Gupta <[email protected]>

Author: GuptaManan100

go/test/endtoend/vtgate/queries/timeout/timeout_test.go

@@ -198,7 +198,7 @@ func TestOverallQueryTimeout(t *testing.T) {
 	_, err := utils.ExecAllowError(t, mcmp.VtConn, "select /*vt+ QUERY_TIMEOUT_MS=4000 */ sleep(u2.id2), u1.id2 from t1 u1 join t1 u2 where u1.id2 = u2.id1")
 	assert.Error(t, err)
 	// We can get two different error messages based on whether it is coming from vttablet or vtgate
-	deadLineExceeded := "DeadlineExceeded desc = stream terminated by RST_STREAM"
+	deadLineExceeded := "DeadlineExceeded desc"
 	if !strings.Contains(err.Error(), "Query execution was interrupted, maximum statement execution time exceeded") {
 		assert.ErrorContains(t, err, deadLineExceeded)
 	}