This library is a tiny wrapper around prometheus's MustRegister function
that does a single round of trying to unregister and re-register before
panicking.
The reason for creating this library is that when starting DECODE components we use a simple backoff retry wrapper when booting the server to deal with waiting for the database to be ready. This sometimes panics because of Prometheus metrics as the default provider immediately panics if we attempt to register the same collector twice.
The hope with this library is that we will instead unregister the old collector and register a new one.