Update wrapper to match wrapper module in caravel_user_project

[kbeckmann]

I wasn't able to run ./multi_tool.py --config projects.yaml --test-all --force-delete without this change. It seems the wrapper has been changed slightly in https://github.com/efabless/caravel_user_project so I changed it here accordingly. Please ignore this PR if this is the wrong approach of if I'm missing something!

[kbeckmann]

After realizing what this actually does, I suppose maybe the project template should either:

• not be updated and keep use la_oen, and only use la_oenb in the routing to the caravel module
• updated to use la_oenb everywhere

There is also the new signal output [2:0] user_irq to interrupt the management core, which might be useful. Would probably require some more elaborate routing in the multi project setup.

Maybe you've already thought this through. I was just trying to get the current code to build :smiley:.