Currently there appears to be a test order dependency between a couple
of the info_test.go test cases and the Test_PrometheusHandler test. This
can be exposed by running:
go test -count 2 ./internal/telemetry/metrics
The test cases in info_test.go overwrite the global 'registry' variable,
which seems to prevent Test_PrometheusHandler from being able to export
the internal Go metrics. Add a helper method to restore the original
registry after these test cases.