Check for all forms of display name

[robbai]

Summary

Check for alternative storage names of "display name" since they are not always the same

How did you test this change?

/dev

[robbai]

not a fan, annotations state that the function is expecting standardPlayer and not match2player or an abitrary table

I've changed it now to only be used where necessary

[hjpalpha]

alternative solution (personally do not have a preference, just leaving it here as an option; untested fwiw):

---@param opponent table
---@return boolean
function MatchFunctions._checkForNonEmptyOpponent(opponent)
	return not Opponent.isTbd(Opponent.fromMatch2Record(opponent))
end