What: this will make it so release binaries default to whatever-release instead of whatever-dev in metrics collection
Why: So we can monitor release binaries with default configuration without getting drowned out by dev binaries
This change removes automatic metrics reporting for everything going
through process.Exec(), and re-adds metrics reporting for those commands
which are expected to be long-lived. Other commands (which may have been
intermittently sending metrics before this, if they ran unusually long)
will no longer send any metrics.
For commands where it makes sense, a node ID is used as the metrics ID.
