Sweep old entities from 2D binned render phases

[superdump]

Objective

• Sweep bins after queuing so as to only sweep them once. #17787 removed sweeping of binned render phases from 2D by accident due to them not using the BinnedRenderPhasePlugin.
• Fixes 2d specialized material shader defs aren't updated #17885

Solution

• Schedule sweep_old_entities in QueueSweep like BinnedRenderPhasePlugin does, but for 2D where that plugin is not used.

Testing

Tested with the modified shader_defs example in #17885 .

[tychedelia]

Thanks for catching this.

[pcwalton]

Sorry about that, thanks for the catch!

[superdump]

Sorry about that, thanks for the catch!

Easily done. No worries.