Positions table flashes old tab of data when switching tabs

[bwallacee]

If you have quite a few orders in the different tabs of the positions table.

When you swap between the tabs, it flashes with the previous tabs data before updating to the correct tab data.

The flash is annoying and it also affects e2e tests that are trying to assert against tables.

https://github.com/vegaprotocol/frontend-monorepo/assets/133853298/7fffa7b5-a158-43c7-bce0-63f3d1625fea