[Bug]: Can not log into dev environment when ~/.ssh/environment file becomes too large

[james-boydell]

Steps to reproduce

This is the same bug as #2257.

Actual behaviour

No response

Expected behaviour

No response

dstack version

0.18.40

Server logs

Additional information

It appears it's not fixed and the environment file is still being appended to, occasionally resulting in failed ssh connections.

One of our users has only been using dstack for two weeks and has already encountered this bug.

They have noted they get 3-4 ungraceful shutdowns a week. Maybe this is contributing?

[peterschmidt85]

cc @un-def