replace the vertex group on all modifiers with attribute input so geometry nodes is fully integrated with the rest of Blender

Currently we have a great new system for adding and manipulating attributes in the form of geometry nodes. Modifiers are still limited to only accepting the older vertex groups as inputs.

I suggest we replace the vertex group inputs of all modifiers with attributes, allowing for a level of modifier control that otherwise isn't possible.

Imagine feeding the bevel modifier an edge group for example, whose values are modified each frame!