[V5] ContextMenu does not lazy render popover anymoe

Environment

• Package version(s): 5.0.0-alpha.3
• Operating System: MacOS
• Browser name and version: Chrome

Steps to reproduce

• We're migrating ContextMenu2 --> ContextMenu, but see some degrade in performance for some of our table.

Actual behavior

• Lots of portal divs are created in advance, this is not happening with ContextMenu2, it used to be lazy,

• I am trying to pass lazy: true to popoverProps but TypeScript complaining, apparently because we only pick a handful of props.

Expected behavior

• lazy should be the default, like it was with ContextMenu2

Possible solution

I'm not too sure this time...