Always print progress bar

[bkorycki]

Output with --machine-reports --parallel true flags from before:

After this change:

Let me know if this is what we want.

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[wpietri]

Not sure how hard this would be, but what I was hoping for with --machine-reports was no progress bar, the JSONL progress update, and either regular logging or structlog-style JSONL logging.

[bkorycki]

Okay I made quite a few changes @wpietri @dhosterman

• Renamed --machine-reports to --json-logs
• Regular logging is always printed
• CLI progress bars are disabled with --json-logs
• Disable modelgauge plugin loading progress bar in cli
• Print initial progress json at beginning of execution.
• Reverted to using echo instead of logging.info. I originally switching over to logging in the first progress reports PR in order to handle different log levels for machine vs. human callers. This is not relevant now that log statements always need to be printed. Also logging.info did not print to stdout in parallel mode.

[dhosterman]

I just tested this against the latest changes in modellab and it works great! It's still showing progress bars for the dependency downloads, but that'll require downstream work in modelgauge to fix and doesn't impede using the progress data provided.