Improve error message when volume is incorrect (or auto append "file://")

[aronchick]

❯ bacalhau docker run -i /var/log/logs_to_process:/var/log/logs_to_process:rw ubuntu ls -la /var/log/logs_to_process

Error: invalid argument "/var/log/logs_to_process:/var/log/logs_to_process:rw" for "-i, --input" flag: parse ":///var/log/logs_to_process:/var/log/logs_to_process": missing protocol scheme

IDEALLY this would just append "file://" to the front.

❯ bacalhau docker run -i file://var/log/logs_to_process:/var/log/logs_to_process:rw ubuntu ls -la /var/log/logs_to_process
Job successfully submitted. Job ID: j-0bc2419e-7e98-44df-b335-a2150960e1f2
Checking job status... (Enter Ctrl+C to exit at any time, your job will continue running):

 TIME          EXEC. ID    TOPIC            EVENT
 21:47:25.375              Submission       Job submitted
 21:47:25.408  e-1773ec70  Scheduling       Requested execution on 4b60888a
 21:47:27.252  e-1773ec70  Exec Scanning    Error: calculating resource usage of job: error getting job disk space requirements: volume
                                            not in allowed paths

This is an incorrect error - it's not "disk space requirements". IDEALLY we had something more clear!

[linear]

ENG-480 Improve error message when volume is incorrect (or auto append "file://")