Internalize get vorticity field maximum in flow simulator

[fankiat]

I am thinking of internalizing the get max of vorticity field functionality into flow simulator itself. That way one can track diagnostics of max vorticity and the global max is taken care of within the flow simulator itself (with reduction and whatnot between ranks). What do you think @bhosale2 ? A similar idea here is the internalization of get lag grid deviation error in immersed body flow interactor.