Deploy a more recent version of prometheus-statsd-exporter on all nodes

The current version of prometheus statsd exporter we're using in prod is "fairly" ancient. Among other things, it doesn't support (and silently drops!) metrics with inconsistent label sets.

Unfortunately, the changes in the core/git loader have introduced such metrics. So we should upgrade the version of our local statsd-exporter package to support them.

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Migrated from T4225 (view on Phabricator)