Add a way to selectively disable `run_command` & co output to `stdout` on `bolt plan`

Use Case

I followed the breadcrumbs and ended up looking at #2653 .

I have the following block of code as part of a plan to do some testing:

    $pr = run_command(
        "/opt/puppetlabs/bin/puppet agent -t --noop --color=true --detailed-exitcodes --environment ${branch}",
        $targets, '_run_as' => 'root')

    $pr.to_data.each |$result| {
        # Detailed exit codes: https://www.puppet.com/docs/puppet/8/man/agent#usage-notes
         if $result['exit_code'] == 0 {
            out::message("${result['target']}: No change")
        } elsif $result['exit_code'] == 2 {
            out::message("${result['target']}: Succeeded with changes")
            out::message($result['value']['stdout'])
        } else {
            out::message("${result['target']}: Fail or didn't run")
            out::message($result['value']['stdout'])
        }
    }

Problem is, I get all the output from puppet on stdout even though 95% of hosts should be "No change". This is very verbose and I'd like to be able to summarize the command. So capturing the output is good, displaying it by default is good, but having a way to not do it on a run_command basis would be great.

Describe the Solution You Would Like

A _print option on run_command & related, set to true by default. If set to false, does not print to the CLI.

Describe Alternatives You've Considered

Since we run puppet in test mode to get a clear output, we could do one run without test mode, one run in term mode for those who fail, but that seems overkill. Another option would be to disable showing the output by default, but in the grander picture, it doesn't seem like the best approach.

Start by tracing the run_command entry point and the related command functions used by bolt plan, then follow where their captured output is sent to the CLI. Check how plan options are parsed and documented. Done means a per-command _print option can suppress CLI output while preserving captured results, with the default behavior unchanged.