pre-commit install in run_once.sh broken

[ndiamant]

What
./scripts/run_once.sh does not install pre-commit correctly.

Why
Nice to have pre-commit on VMs automatically.

How
This is what happens now:

Installing collected packages: pre-commit
  WARNING: The scripts pre-commit, pre-commit-validate-config and pre-commit-validate-manifest are installed in '/home/nate/.local/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pre-commit-2.4.0
./scripts/vm_launch/run_once.sh: line 15: pre-commit: command not found

Should be easy-ish to add pre-commit to $PATH automatically or something.

Acceptance Criteria
run_once.sh works