Add -q, --quiet option

[bradlo]

The quiet flag will suppress the info line output for each command. It will still print outputs for operations that have outputs, such as list-databases.

Do we need a -qq and --quiet=2 to supporess all output? (dont think so).

[billscheidel-rai]

Note: This issue has been migrated to https://relationalai.atlassian.net/browse/RAI-7199.

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