update bash scripts to #!/usr/bin/env bash

[andiradulescu]

Mostly for macOS.

A good explaination here.

Needed this to run som_debug.sh on macOS, but decided to update all scripts.

Same thing for:

• openpilot update bash scripts to #!/usr/bin/env bash openpilot#33111
• agnos-builder update bash scripts to #!/usr/bin/env bash agnos-builder#268