pip installed packages in `.local/` break when Python version changes

Hi all,

just reporting my observation that when I tried to update to the new full-stack image, I noticed that packages installed locally via pip into `~/.local` broke since the python version was updated. I guess this is a general issue, and not sure what the solution is.

Perhaps aiidalab should offer an option to automatically reinstall all apps? I guess this might be needed in addition to the Postgres migration if we need a clean migration path.