[BUG] env blocks don't set environment variables for script or terminal blocks running over SSH

[BinaryMuse]

Bug Description

env blocks don't affect script or terminal blocks running over SSH.

Steps to Reproduce

1. Create an env block
2. Create an ssh block
3. Create a script block

Expected Behavior

The script block has access to the env var

Actual Behavior

The env var is not set in the SSH session

[BinaryMuse]

As found when implementing $ATUIN_OUTPUT_VARS, there's no great way to set environment variables over an SSH session other than prepending the user's input with the kv pairs.