Move metasploit-concern to gemspec

MSP-11359

The dependency on `metasploit-concern` should not have been in the db
group as `Metasploit::Concern.run` is called for
`Msf::Exploit:Remote::HttpServer`, which works without the db group
installed.  This is a fix for a bug from #3781.
Update gems

MSP-11359
Update to released metasploit-model

MSP-11359
Add detected_arch to expected hosts columns in spec

MSP-11359
Update schema with detected_arch

MSP-11359
Update metasploit_data_models

MSP-11359

Include fix for loading from metasploit_data_models/lib.
Land #3818, Metasploit::Concern loading