Now that oneapi-src#740 is merged, actually use `urDeviceGetSelected` in the
`urinfo` tool to mirror the behaviour of the `sycl-ls` tool.

After allowing urDeviceGetSelected to return zero devices rather than
returning an error, a number of unit tests started failing. This patch
fixes these tests by returning the expected error code during parsing,
rather than after processing all ODS terms. This has the caveat of not
processing all ODS terms before reporting an error and should be
revisited once more robust testing is in place.