bitbake: toaster: Create default project with get_or_create* method

bitbake: toaster: Create default project with get_or_create* method

Rather than maintain data as part of the migrations (as was
done for the default project previously), create the default
(cli builds) project on demand as a by-product of getting
it from the database.

[YOCTO #8364]

(Bitbake rev: 5fd8e90ab9b81d1bd0d301bc1c91228ecbbea74b)

Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: brian avery <avery.brian@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>