SIMCOM_SIM7600E-H returns "+CME ERROR: 10" (SIM not inserted) during SIM initialization

The SIMCOM_SIM7600E-H modem may return "+CME ERROR: 10" (SIM not inserted) during modem bootup until the SIM is fully ready. This leads ModemManager to think there is no SIM card and flags the modem as failed, while it could have retried several times and the SIM card would eventually be reported as READY.

See https://lists.freedesktop.org/archives/modemmanager-devel/2023-April/009663.html for context.

We should probably treat "+CME ERROR: 10" as a retriable error in the "load unlock required" procedure to workaround this, in the same way as we do in the MBIM logic.

Note that this change would make the initial detection of modems when no SIM card is available much slower (as the modem wouldn't be exposed in DBus until the procedure finishes), but that is something we've already been living with in the MBIM case for a very long time.