Serial console might still work since it has the most minimal of requirements. Do you have serial console access? See:
Also, note that if you cannot get access, but if your data is valuable, then you can clone, edit the clone on a host PC, and then flash back to the Jetson (other than your edit this would be an exact match).
You’ll probably end up deleting something not installed by the package manager just to get enough space for login, and then using
apt to get rid of some of those packages. If those packages are somewhere in “
/usr/local”, then you can probably just mount more memory there after moving that content over to an alternative media…temporarily even if not permanently.